added "UserPermissionTesting_CS_WinForms" project

.antigravitycli/feaeef25-a553-4345-ba51-5eb86eb0eee0.json

@@ -0,0 +1 @@
+C:/Users/ataka/.gemini/config/projects/feaeef25-a553-4345-ba51-5eb86eb0eee0.json

CodingSandbox.slnx

@@ -1,3 +1,4 @@
 <Solution>
-  <Project Path="UserPermissionTesting_CS_WinForms/UserPermissionTesting_CS_WinForms.csproj" />
+  <Project Path="UserPermissionTest_CS_WinForms\UserPermissionTest_CS_WinForms.csproj" />
 </Solution>
+

UserPermissionTest_CS_WinForms/IUserRepository.cs

@@ -0,0 +1,12 @@
+using System.Collections.Generic;
+
+namespace UserPermissionTest_CS_WinForms
+{
+    public interface IUserRepository
+    {
+        List<User> LoadUsers();
+        void SaveUsers(List<User> users);
+        List<string> LoadPermissions();
+        void SavePermissions(List<string> permissions);
+    }
+}

UserPermissionTest_CS_WinForms/JsonUserRepository.cs

@@ -0,0 +1,145 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using Newtonsoft.Json;
+
+namespace UserPermissionTest_CS_WinForms
+{
+    public class JsonUserRepository : IUserRepository
+    {
+        private const string UsersFile = "users.json";
+        private const string PermissionsFile = "permissions.json";
+
+        public List<User> LoadUsers()
+        {
+            if (!File.Exists(UsersFile))
+            {
+                var defaults = GetDefaultUsers();
+                SaveUsers(defaults);
+                return defaults;
+            }
+
+            try
+            {
+                string json = File.ReadAllText(UsersFile);
+                var users = JsonConvert.DeserializeObject<List<User>>(json);
+                if (users == null) return GetDefaultUsers();
+
+                // Dynamic Migration: If any loaded user has a plain text password, hash it and re-save
+                bool modified = false;
+                foreach (var user in users)
+                {
+                    if (user.Password.Length != 64 || !IsHexString(user.Password))
+                    {
+                        user.Password = PasswordHasher.HashPassword(user.Password);
+                        modified = true;
+                    }
+                }
+
+                if (modified)
+                {
+                    SaveUsers(users);
+                }
+
+                return users;
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine("Error reading users JSON, falling back to defaults: " + ex.Message);
+                return GetDefaultUsers();
+            }
+        }
+
+        private bool IsHexString(string str)
+        {
+            if (string.IsNullOrEmpty(str)) return false;
+            foreach (char c in str)
+            {
+                if (!((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F')))
+                    return false;
+            }
+            return true;
+        }
+
+        public void SaveUsers(List<User> users)
+        {
+            try
+            {
+                string json = JsonConvert.SerializeObject(users, Formatting.Indented);
+                File.WriteAllText(UsersFile, json);
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine("Error writing users JSON: " + ex.Message);
+            }
+        }
+
+        public List<string> LoadPermissions()
+        {
+            if (!File.Exists(PermissionsFile))
+            {
+                var defaults = GetDefaultPermissions();
+                SavePermissions(defaults);
+                return defaults;
+            }
+
+            try
+            {
+                string json = File.ReadAllText(PermissionsFile);
+                var permissions = JsonConvert.DeserializeObject<List<string>>(json);
+                return permissions ?? GetDefaultPermissions();
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine("Error reading permissions JSON, falling back to defaults: " + ex.Message);
+                return GetDefaultPermissions();
+            }
+        }
+
+        public void SavePermissions(List<string> permissions)
+        {
+            try
+            {
+                string json = JsonConvert.SerializeObject(permissions, Formatting.Indented);
+                File.WriteAllText(PermissionsFile, json);
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine("Error writing permissions JSON: " + ex.Message);
+            }
+        }
+
+        private List<User> GetDefaultUsers()
+        {
+            return new List<User>
+            {
+                new User
+                {
+                    Username = "admin",
+                    FullName = "System Administrator",
+                    Password = PasswordHasher.HashPassword("admin"),
+                    Permissions = GetDefaultPermissions()
+                },
+                new User
+                {
+                    Username = "user",
+                    FullName = "Standard User",
+                    Password = PasswordHasher.HashPassword("user"),
+                    Permissions = new List<string> { "View Dashboard" }
+                }
+            };
+        }
+
+        private List<string> GetDefaultPermissions()
+        {
+            return new List<string>
+            {
+                "View Dashboard",
+                "Edit Settings",
+                "Manage Users",
+                "Full Control",
+                "Delete Transactions"
+            };
+        }
+    }
+}

UserPermissionTest_CS_WinForms/LoginDialog.Designer.cs

@@ -0,0 +1,218 @@
+namespace UserPermissionTest_CS_WinForms
+{
+    partial class LoginDialog
+    {
+        private System.ComponentModel.IContainer components = null;
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        private void InitializeComponent()
+        {
+            this.pnlHeader = new System.Windows.Forms.Panel();
+            this.lblTitle = new System.Windows.Forms.Label();
+            this.lblSubtitle = new System.Windows.Forms.Label();
+            this.lblUsername = new System.Windows.Forms.Label();
+            this.txtUsername = new System.Windows.Forms.TextBox();
+            this.lblPassword = new System.Windows.Forms.Label();
+            this.txtPassword = new System.Windows.Forms.TextBox();
+            this.btnTogglePassword = new System.Windows.Forms.Button();
+            this.btnLogin = new System.Windows.Forms.Button();
+            this.btnCancel = new System.Windows.Forms.Button();
+            this.lblError = new System.Windows.Forms.Label();
+            this.pnlHeader.SuspendLayout();
+            this.SuspendLayout();
+            // 
+            // pnlHeader
+            // 
+            this.pnlHeader.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(30)))), ((int)(((byte)(41)))), ((int)(((byte)(59)))));
+            this.pnlHeader.Controls.Add(this.lblTitle);
+            this.pnlHeader.Controls.Add(this.lblSubtitle);
+            this.pnlHeader.Dock = System.Windows.Forms.DockStyle.Top;
+            this.pnlHeader.Location = new System.Drawing.Point(0, 0);
+            this.pnlHeader.Name = "pnlHeader";
+            this.pnlHeader.Size = new System.Drawing.Size(380, 80);
+            this.pnlHeader.TabIndex = 0;
+            // 
+            // lblTitle
+            // 
+            this.lblTitle.AutoSize = true;
+            this.lblTitle.Font = new System.Drawing.Font("Segoe UI Semibold", 16F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblTitle.ForeColor = System.Drawing.Color.White;
+            this.lblTitle.Location = new System.Drawing.Point(20, 15);
+            this.lblTitle.Name = "lblTitle";
+            this.lblTitle.Size = new System.Drawing.Size(126, 30);
+            this.lblTitle.TabIndex = 0;
+            this.lblTitle.Text = "User Sign In";
+            // 
+            // lblSubtitle
+            // 
+            this.lblSubtitle.AutoSize = true;
+            this.lblSubtitle.Font = new System.Drawing.Font("Segoe UI", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblSubtitle.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(148)))), ((int)(((byte)(163)))), ((int)(((byte)(184)))));
+            this.lblSubtitle.Location = new System.Drawing.Point(22, 45);
+            this.lblSubtitle.Name = "lblSubtitle";
+            this.lblSubtitle.Size = new System.Drawing.Size(189, 15);
+            this.lblSubtitle.TabIndex = 1;
+            this.lblSubtitle.Text = "Please enter your credentials to login";
+            // 
+            // lblUsername
+            // 
+            this.lblUsername.AutoSize = true;
+            this.lblUsername.Font = new System.Drawing.Font("Segoe UI Semibold", 9.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblUsername.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(71)))), ((int)(((byte)(85)))), ((int)(((byte)(105)))));
+            this.lblUsername.Location = new System.Drawing.Point(30, 100);
+            this.lblUsername.Name = "lblUsername";
+            this.lblUsername.Size = new System.Drawing.Size(69, 17);
+            this.lblUsername.TabIndex = 1;
+            this.lblUsername.Text = "Username";
+            // 
+            // txtUsername
+            // 
+            this.txtUsername.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(248)))), ((int)(((byte)(250)))), ((int)(((byte)(252)))));
+            this.txtUsername.Font = new System.Drawing.Font("Segoe UI", 11.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.txtUsername.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(15)))), ((int)(((byte)(23)))), ((int)(((byte)(42)))));
+            this.txtUsername.Location = new System.Drawing.Point(30, 122);
+            this.txtUsername.Name = "txtUsername";
+            this.txtUsername.Size = new System.Drawing.Size(320, 27);
+            this.txtUsername.TabIndex = 2;
+            // 
+            // lblPassword
+            // 
+            this.lblPassword.AutoSize = true;
+            this.lblPassword.Font = new System.Drawing.Font("Segoe UI Semibold", 9.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblPassword.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(71)))), ((int)(((byte)(85)))), ((int)(((byte)(105)))));
+            this.lblPassword.Location = new System.Drawing.Point(30, 160);
+            this.lblPassword.Name = "lblPassword";
+            this.lblPassword.Size = new System.Drawing.Size(66, 17);
+            this.lblPassword.TabIndex = 3;
+            this.lblPassword.Text = "Password";
+            // 
+            // txtPassword
+            // 
+            this.txtPassword.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(248)))), ((int)(((byte)(250)))), ((int)(((byte)(252)))));
+            this.txtPassword.Font = new System.Drawing.Font("Segoe UI", 11.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.txtPassword.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(15)))), ((int)(((byte)(23)))), ((int)(((byte)(42)))));
+            this.txtPassword.Location = new System.Drawing.Point(30, 182);
+            this.txtPassword.Name = "txtPassword";
+            this.txtPassword.PasswordChar = '•';
+            this.txtPassword.Size = new System.Drawing.Size(285, 27);
+            this.txtPassword.TabIndex = 4;
+            // 
+            // btnTogglePassword
+            // 
+            this.btnTogglePassword.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(241)))), ((int)(((byte)(245)))), ((int)(((byte)(249)))));
+            this.btnTogglePassword.Cursor = System.Windows.Forms.Cursors.Hand;
+            this.btnTogglePassword.FlatAppearance.BorderSize = 0;
+            this.btnTogglePassword.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
+            this.btnTogglePassword.Font = new System.Drawing.Font("Segoe UI", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.btnTogglePassword.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(71)))), ((int)(((byte)(85)))), ((int)(((byte)(105)))));
+            this.btnTogglePassword.Location = new System.Drawing.Point(320, 182);
+            this.btnTogglePassword.Name = "btnTogglePassword";
+            this.btnTogglePassword.Size = new System.Drawing.Size(30, 27);
+            this.btnTogglePassword.TabIndex = 8;
+            this.btnTogglePassword.Text = "👁";
+            this.btnTogglePassword.UseVisualStyleBackColor = false;
+            this.btnTogglePassword.Click += new System.EventHandler(this.btnTogglePassword_Click);
+            // 
+            // btnLogin
+            // 
+            this.btnLogin.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(99)))), ((int)(((byte)(102)))), ((int)(((byte)(241)))));
+            this.btnLogin.Cursor = System.Windows.Forms.Cursors.Hand;
+            this.btnLogin.FlatAppearance.BorderSize = 0;
+            this.btnLogin.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
+            this.btnLogin.Font = new System.Drawing.Font("Segoe UI Semibold", 10F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.btnLogin.ForeColor = System.Drawing.Color.White;
+            this.btnLogin.Location = new System.Drawing.Point(230, 245);
+            this.btnLogin.Name = "btnLogin";
+            this.btnLogin.Size = new System.Drawing.Size(120, 36);
+            this.btnLogin.TabIndex = 5;
+            this.btnLogin.Text = "Login";
+            this.btnLogin.UseVisualStyleBackColor = false;
+            this.btnLogin.Click += new System.EventHandler(this.btnLogin_Click);
+            // 
+            // btnCancel
+            // 
+            this.btnCancel.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(241)))), ((int)(((byte)(245)))), ((int)(((byte)(249)))));
+            this.btnCancel.Cursor = System.Windows.Forms.Cursors.Hand;
+            this.btnCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
+            this.btnCancel.FlatAppearance.BorderSize = 0;
+            this.btnCancel.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
+            this.btnCancel.Font = new System.Drawing.Font("Segoe UI Semibold", 10F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.btnCancel.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(71)))), ((int)(((byte)(85)))), ((int)(((byte)(105)))));
+            this.btnCancel.Location = new System.Drawing.Point(100, 245);
+            this.btnCancel.Name = "btnCancel";
+            this.btnCancel.Size = new System.Drawing.Size(120, 36);
+            this.btnCancel.TabIndex = 6;
+            this.btnCancel.Text = "Cancel";
+            this.btnCancel.UseVisualStyleBackColor = false;
+            this.btnCancel.Click += new System.EventHandler(this.btnCancel_Click);
+            // 
+            // lblError
+            // 
+            this.lblError.AutoSize = true;
+            this.lblError.Font = new System.Drawing.Font("Segoe UI", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblError.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(239)))), ((int)(((byte)(68)))), ((int)(((byte)(68)))));
+            this.lblError.Location = new System.Drawing.Point(30, 215);
+            this.lblError.Name = "lblError";
+            this.lblError.Size = new System.Drawing.Size(167, 15);
+            this.lblError.TabIndex = 7;
+            this.lblError.Text = "Invalid username or password!";
+            this.lblError.Visible = false;
+            // 
+            // LoginDialog
+            // 
+            this.AcceptButton = this.btnLogin;
+            this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.BackColor = System.Drawing.Color.White;
+            this.CancelButton = this.btnCancel;
+            this.ClientSize = new System.Drawing.Size(380, 305);
+            this.Controls.Add(this.lblError);
+            this.Controls.Add(this.btnCancel);
+            this.Controls.Add(this.btnLogin);
+            this.Controls.Add(this.txtPassword);
+            this.Controls.Add(this.btnTogglePassword);
+            this.Controls.Add(this.lblPassword);
+            this.Controls.Add(this.txtUsername);
+            this.Controls.Add(this.lblUsername);
+            this.Controls.Add(this.pnlHeader);
+            this.Font = new System.Drawing.Font("Segoe UI", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
+            this.MaximizeBox = false;
+            this.MinimizeBox = false;
+            this.Name = "LoginDialog";
+            this.ShowIcon = false;
+            this.ShowInTaskbar = false;
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
+            this.Text = "Sign In";
+            this.pnlHeader.ResumeLayout(false);
+            this.pnlHeader.PerformLayout();
+            this.ResumeLayout(false);
+            this.PerformLayout();
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.Panel pnlHeader;
+        private System.Windows.Forms.Label lblTitle;
+        private System.Windows.Forms.Label lblSubtitle;
+        private System.Windows.Forms.Label lblUsername;
+        private System.Windows.Forms.TextBox txtUsername;
+        private System.Windows.Forms.Label lblPassword;
+        private System.Windows.Forms.TextBox txtPassword;
+        private System.Windows.Forms.Button btnTogglePassword;
+        private System.Windows.Forms.Button btnLogin;
+        private System.Windows.Forms.Button btnCancel;
+        private System.Windows.Forms.Label lblError;
+    }
+}

UserPermissionTest_CS_WinForms/LoginDialog.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Windows.Forms;
+
+namespace UserPermissionTest_CS_WinForms
+{
+    public partial class LoginDialog : Form
+    {
+        public LoginDialog()
+        {
+            InitializeComponent();
+        }
+
+        private void btnLogin_Click(object sender, EventArgs e)
+        {
+            lblError.Visible = false;
+            string username = txtUsername.Text.Trim();
+            string password = txtPassword.Text;
+
+            if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password))
+            {
+                lblError.Text = "Please fill in all fields.";
+                lblError.Visible = true;
+                return;
+            }
+
+            if (SessionManager.Login(username, password))
+            {
+                this.DialogResult = DialogResult.OK;
+                this.Close();
+            }
+            else
+            {
+                lblError.Text = "Invalid username or password!";
+                lblError.Visible = true;
+                txtPassword.Clear();
+                txtPassword.Focus();
+            }
+        }
+
+        private void btnCancel_Click(object sender, EventArgs e)
+        {
+            this.DialogResult = DialogResult.Cancel;
+            this.Close();
+        }
+
+        private void btnTogglePassword_Click(object sender, EventArgs e)
+        {
+            if (txtPassword.PasswordChar == '•')
+            {
+                txtPassword.PasswordChar = '\0'; // Show password
+                btnTogglePassword.Text = "🙈";
+            }
+            else
+            {
+                txtPassword.PasswordChar = '•'; // Mask password
+                btnTogglePassword.Text = "👁";
+            }
+        }
+    }
+}

UserPermissionTest_CS_WinForms/MainForm.Designer.cs

@@ -0,0 +1,319 @@
+namespace UserPermissionTest_CS_WinForms
+{
+    partial class MainForm
+    {
+        private System.ComponentModel.IContainer components = null;
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        private void InitializeComponent()
+        {
+            this.pnlHeader = new System.Windows.Forms.Panel();
+            this.lblTitle = new System.Windows.Forms.Label();
+            this.lblSubtitle = new System.Windows.Forms.Label();
+            this.pnlSidebar = new System.Windows.Forms.Panel();
+            this.btnUsers = new System.Windows.Forms.Button();
+            this.btnLogout = new System.Windows.Forms.Button();
+            this.btnLogin = new System.Windows.Forms.Button();
+            this.pnlContent = new System.Windows.Forms.Panel();
+            this.pnlSessionCard = new System.Windows.Forms.Panel();
+            this.lstUserPermissions = new System.Windows.Forms.ListBox();
+            this.lblPermissionsHeader = new System.Windows.Forms.Label();
+            this.pnlDivider = new System.Windows.Forms.Panel();
+            this.lblFullNameValue = new System.Windows.Forms.Label();
+            this.lblFullNameLabel = new System.Windows.Forms.Label();
+            this.lblUsernameValue = new System.Windows.Forms.Label();
+            this.lblUsernameLabel = new System.Windows.Forms.Label();
+            this.lblStatusBadge = new System.Windows.Forms.Label();
+            this.lblSessionHeader = new System.Windows.Forms.Label();
+            this.pnlHeader.SuspendLayout();
+            this.pnlSidebar.SuspendLayout();
+            this.pnlContent.SuspendLayout();
+            this.pnlSessionCard.SuspendLayout();
+            this.SuspendLayout();
+            // 
+            // pnlHeader
+            // 
+            this.pnlHeader.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(30)))), ((int)(((byte)(41)))), ((int)(((byte)(59)))));
+            this.pnlHeader.Controls.Add(this.lblTitle);
+            this.pnlHeader.Controls.Add(this.lblSubtitle);
+            this.pnlHeader.Dock = System.Windows.Forms.DockStyle.Top;
+            this.pnlHeader.Location = new System.Drawing.Point(0, 0);
+            this.pnlHeader.Name = "pnlHeader";
+            this.pnlHeader.Size = new System.Drawing.Size(684, 80);
+            this.pnlHeader.TabIndex = 0;
+            // 
+            // lblTitle
+            // 
+            this.lblTitle.AutoSize = true;
+            this.lblTitle.Font = new System.Drawing.Font("Segoe UI Semibold", 16F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblTitle.ForeColor = System.Drawing.Color.White;
+            this.lblTitle.Location = new System.Drawing.Point(20, 15);
+            this.lblTitle.Name = "lblTitle";
+            this.lblTitle.Size = new System.Drawing.Size(325, 30);
+            this.lblTitle.TabIndex = 0;
+            this.lblTitle.Text = "Authentication && Security Portal";
+            // 
+            // lblSubtitle
+            // 
+            this.lblSubtitle.AutoSize = true;
+            this.lblSubtitle.Font = new System.Drawing.Font("Segoe UI", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblSubtitle.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(148)))), ((int)(((byte)(163)))), ((int)(((byte)(184)))));
+            this.lblSubtitle.Location = new System.Drawing.Point(22, 45);
+            this.lblSubtitle.Name = "lblSubtitle";
+            this.lblSubtitle.Size = new System.Drawing.Size(342, 15);
+            this.lblSubtitle.TabIndex = 1;
+            this.lblSubtitle.Text = "Secure WinForms Session Sandbox - Target Framework .NET 4.8.1";
+            // 
+            // pnlSidebar
+            // 
+            this.pnlSidebar.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(248)))), ((int)(((byte)(250)))), ((int)(((byte)(252)))));
+            this.pnlSidebar.Controls.Add(this.btnUsers);
+            this.pnlSidebar.Controls.Add(this.btnLogout);
+            this.pnlSidebar.Controls.Add(this.btnLogin);
+            this.pnlSidebar.Dock = System.Windows.Forms.DockStyle.Left;
+            this.pnlSidebar.Location = new System.Drawing.Point(0, 80);
+            this.pnlSidebar.Name = "pnlSidebar";
+            this.pnlSidebar.Padding = new System.Windows.Forms.Padding(15);
+            this.pnlSidebar.Size = new System.Drawing.Size(180, 301);
+            this.pnlSidebar.TabIndex = 1;
+            // 
+            // btnUsers
+            // 
+            this.btnUsers.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(241)))), ((int)(((byte)(245)))), ((int)(((byte)(249)))));
+            this.btnUsers.Cursor = System.Windows.Forms.Cursors.Hand;
+            this.btnUsers.Dock = System.Windows.Forms.DockStyle.Top;
+            this.btnUsers.FlatAppearance.BorderSize = 0;
+            this.btnUsers.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
+            this.btnUsers.Font = new System.Drawing.Font("Segoe UI Semibold", 10F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.btnUsers.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(51)))), ((int)(((byte)(65)))), ((int)(((byte)(85)))));
+            this.btnUsers.Location = new System.Drawing.Point(15, 107);
+            this.btnUsers.Name = "btnUsers";
+            this.btnUsers.Size = new System.Drawing.Size(150, 46);
+            this.btnUsers.TabIndex = 2;
+            this.btnUsers.Text = "👥 Manage Users";
+            this.btnUsers.UseVisualStyleBackColor = false;
+            this.btnUsers.Click += new System.EventHandler(this.btnUsers_Click);
+            // 
+            // btnLogout
+            // 
+            this.btnLogout.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(254)))), ((int)(((byte)(242)))), ((int)(((byte)(242)))));
+            this.btnLogout.Cursor = System.Windows.Forms.Cursors.Hand;
+            this.btnLogout.Dock = System.Windows.Forms.DockStyle.Top;
+            this.btnLogout.FlatAppearance.BorderSize = 0;
+            this.btnLogout.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
+            this.btnLogout.Font = new System.Drawing.Font("Segoe UI Semibold", 10F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.btnLogout.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(239)))), ((int)(((byte)(68)))), ((int)(((byte)(68)))));
+            this.btnLogout.Location = new System.Drawing.Point(15, 61);
+            this.btnLogout.Name = "btnLogout";
+            this.btnLogout.Size = new System.Drawing.Size(150, 46);
+            this.btnLogout.TabIndex = 1;
+            this.btnLogout.Text = "🚪 Logout";
+            this.btnLogout.UseVisualStyleBackColor = false;
+            this.btnLogout.Click += new System.EventHandler(this.btnLogout_Click);
+            // 
+            // btnLogin
+            // 
+            this.btnLogin.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(99)))), ((int)(((byte)(102)))), ((int)(((byte)(241)))));
+            this.btnLogin.Cursor = System.Windows.Forms.Cursors.Hand;
+            this.btnLogin.Dock = System.Windows.Forms.DockStyle.Top;
+            this.btnLogin.FlatAppearance.BorderSize = 0;
+            this.btnLogin.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
+            this.btnLogin.Font = new System.Drawing.Font("Segoe UI Semibold", 10F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.btnLogin.ForeColor = System.Drawing.Color.White;
+            this.btnLogin.Location = new System.Drawing.Point(15, 15);
+            this.btnLogin.Name = "btnLogin";
+            this.btnLogin.Size = new System.Drawing.Size(150, 46);
+            this.btnLogin.TabIndex = 0;
+            this.btnLogin.Text = "🔑 Login";
+            this.btnLogin.UseVisualStyleBackColor = false;
+            this.btnLogin.Click += new System.EventHandler(this.btnLogin_Click);
+            // 
+            // pnlContent
+            // 
+            this.pnlContent.BackColor = System.Drawing.Color.White;
+            this.pnlContent.Controls.Add(this.pnlSessionCard);
+            this.pnlContent.Dock = System.Windows.Forms.DockStyle.Fill;
+            this.pnlContent.Location = new System.Drawing.Point(180, 80);
+            this.pnlContent.Name = "pnlContent";
+            this.pnlContent.Padding = new System.Windows.Forms.Padding(20);
+            this.pnlContent.Size = new System.Drawing.Size(504, 301);
+            this.pnlContent.TabIndex = 2;
+            // 
+            // pnlSessionCard
+            // 
+            this.pnlSessionCard.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(248)))), ((int)(((byte)(250)))), ((int)(((byte)(252)))));
+            this.pnlSessionCard.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
+            this.pnlSessionCard.Controls.Add(this.lstUserPermissions);
+            this.pnlSessionCard.Controls.Add(this.lblPermissionsHeader);
+            this.pnlSessionCard.Controls.Add(this.pnlDivider);
+            this.pnlSessionCard.Controls.Add(this.lblFullNameValue);
+            this.pnlSessionCard.Controls.Add(this.lblFullNameLabel);
+            this.pnlSessionCard.Controls.Add(this.lblUsernameValue);
+            this.pnlSessionCard.Controls.Add(this.lblUsernameLabel);
+            this.pnlSessionCard.Controls.Add(this.lblStatusBadge);
+            this.pnlSessionCard.Controls.Add(this.lblSessionHeader);
+            this.pnlSessionCard.Dock = System.Windows.Forms.DockStyle.Fill;
+            this.pnlSessionCard.Location = new System.Drawing.Point(20, 20);
+            this.pnlSessionCard.Name = "pnlSessionCard";
+            this.pnlSessionCard.Padding = new System.Windows.Forms.Padding(15);
+            this.pnlSessionCard.Size = new System.Drawing.Size(464, 261);
+            this.pnlSessionCard.TabIndex = 0;
+            // 
+            // lstUserPermissions
+            // 
+            this.lstUserPermissions.BackColor = System.Drawing.Color.White;
+            this.lstUserPermissions.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
+            this.lstUserPermissions.Font = new System.Drawing.Font("Segoe UI", 9.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lstUserPermissions.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(51)))), ((int)(((byte)(65)))), ((int)(((byte)(85)))));
+            this.lstUserPermissions.FormattingEnabled = true;
+            this.lstUserPermissions.ItemHeight = 17;
+            this.lstUserPermissions.Location = new System.Drawing.Point(200, 75);
+            this.lstUserPermissions.Name = "lstUserPermissions";
+            this.lstUserPermissions.SelectionMode = System.Windows.Forms.SelectionMode.None;
+            this.lstUserPermissions.Size = new System.Drawing.Size(240, 155);
+            this.lstUserPermissions.TabIndex = 8;
+            // 
+            // lblPermissionsHeader
+            // 
+            this.lblPermissionsHeader.AutoSize = true;
+            this.lblPermissionsHeader.Font = new System.Drawing.Font("Segoe UI Semibold", 9F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblPermissionsHeader.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(100)))), ((int)(((byte)(116)))), ((int)(((byte)(139)))));
+            this.lblPermissionsHeader.Location = new System.Drawing.Point(200, 55);
+            this.lblPermissionsHeader.Name = "lblPermissionsHeader";
+            this.lblPermissionsHeader.Size = new System.Drawing.Size(121, 15);
+            this.lblPermissionsHeader.TabIndex = 7;
+            this.lblPermissionsHeader.Text = "ASSIGNED PRIVILEGES";
+            // 
+            // pnlDivider
+            // 
+            this.pnlDivider.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(226)))), ((int)(((byte)(232)))), ((int)(((byte)(240)))));
+            this.pnlDivider.Location = new System.Drawing.Point(180, 50);
+            this.pnlDivider.Name = "pnlDivider";
+            this.pnlDivider.Size = new System.Drawing.Size(1, 180);
+            this.pnlDivider.TabIndex = 6;
+            // 
+            // lblFullNameValue
+            // 
+            this.lblFullNameValue.AutoSize = true;
+            this.lblFullNameValue.Font = new System.Drawing.Font("Segoe UI Semibold", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblFullNameValue.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(15)))), ((int)(((byte)(23)))), ((int)(((byte)(42)))));
+            this.lblFullNameValue.Location = new System.Drawing.Point(15, 160);
+            this.lblFullNameValue.Name = "lblFullNameValue";
+            this.lblFullNameValue.Size = new System.Drawing.Size(14, 19);
+            this.lblFullNameValue.TabIndex = 5;
+            this.lblFullNameValue.Text = "-";
+            // 
+            // lblFullNameLabel
+            // 
+            this.lblFullNameLabel.AutoSize = true;
+            this.lblFullNameLabel.Font = new System.Drawing.Font("Segoe UI Semibold", 9F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblFullNameLabel.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(100)))), ((int)(((byte)(116)))), ((int)(((byte)(139)))));
+            this.lblFullNameLabel.Location = new System.Drawing.Point(15, 140);
+            this.lblFullNameLabel.Name = "lblFullNameLabel";
+            this.lblFullNameLabel.Size = new System.Drawing.Size(68, 15);
+            this.lblFullNameLabel.TabIndex = 4;
+            this.lblFullNameLabel.Text = "FULL NAME";
+            // 
+            // lblUsernameValue
+            // 
+            this.lblUsernameValue.AutoSize = true;
+            this.lblUsernameValue.Font = new System.Drawing.Font("Segoe UI Semibold", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblUsernameValue.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(15)))), ((int)(((byte)(23)))), ((int)(((byte)(42)))));
+            this.lblUsernameValue.Location = new System.Drawing.Point(15, 100);
+            this.lblUsernameValue.Name = "lblUsernameValue";
+            this.lblUsernameValue.Size = new System.Drawing.Size(95, 19);
+            this.lblUsernameValue.TabIndex = 3;
+            this.lblUsernameValue.Text = "Not Logged In";
+            // 
+            // lblUsernameLabel
+            // 
+            this.lblUsernameLabel.AutoSize = true;
+            this.lblUsernameLabel.Font = new System.Drawing.Font("Segoe UI Semibold", 9F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblUsernameLabel.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(100)))), ((int)(((byte)(116)))), ((int)(((byte)(139)))));
+            this.lblUsernameLabel.Location = new System.Drawing.Point(15, 80);
+            this.lblUsernameLabel.Name = "lblUsernameLabel";
+            this.lblUsernameLabel.Size = new System.Drawing.Size(68, 15);
+            this.lblUsernameLabel.TabIndex = 2;
+            this.lblUsernameLabel.Text = "USERNAME";
+            // 
+            // lblStatusBadge
+            // 
+            this.lblStatusBadge.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(239)))), ((int)(((byte)(68)))), ((int)(((byte)(68)))));
+            this.lblStatusBadge.Font = new System.Drawing.Font("Segoe UI Semibold", 8F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblStatusBadge.ForeColor = System.Drawing.Color.White;
+            this.lblStatusBadge.Location = new System.Drawing.Point(15, 45);
+            this.lblStatusBadge.Name = "lblStatusBadge";
+            this.lblStatusBadge.Size = new System.Drawing.Size(95, 22);
+            this.lblStatusBadge.TabIndex = 1;
+            this.lblStatusBadge.Text = "SIGNED OUT";
+            this.lblStatusBadge.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
+            // 
+            // lblSessionHeader
+            // 
+            this.lblSessionHeader.AutoSize = true;
+            this.lblSessionHeader.Font = new System.Drawing.Font("Segoe UI Semibold", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblSessionHeader.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(30)))), ((int)(((byte)(41)))), ((int)(((byte)(59)))));
+            this.lblSessionHeader.Location = new System.Drawing.Point(12, 12);
+            this.lblSessionHeader.Name = "lblSessionHeader";
+            this.lblSessionHeader.Size = new System.Drawing.Size(183, 21);
+            this.lblSessionHeader.TabIndex = 0;
+            this.lblSessionHeader.Text = "Active Session Statistics";
+            // 
+            // MainForm
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.BackColor = System.Drawing.Color.White;
+            this.ClientSize = new System.Drawing.Size(684, 381);
+            this.Controls.Add(this.pnlContent);
+            this.Controls.Add(this.pnlSidebar);
+            this.Controls.Add(this.pnlHeader);
+            this.Font = new System.Drawing.Font("Segoe UI", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
+            this.MaximizeBox = false;
+            this.Name = "MainForm";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Authentication & Directory Sandbox";
+            this.Load += new System.EventHandler(this.MainForm_Load);
+            this.pnlHeader.ResumeLayout(false);
+            this.pnlHeader.PerformLayout();
+            this.pnlSidebar.ResumeLayout(false);
+            this.pnlContent.ResumeLayout(false);
+            this.pnlSessionCard.ResumeLayout(false);
+            this.pnlSessionCard.PerformLayout();
+            this.ResumeLayout(false);
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.Panel pnlHeader;
+        private System.Windows.Forms.Label lblTitle;
+        private System.Windows.Forms.Label lblSubtitle;
+        private System.Windows.Forms.Panel pnlSidebar;
+        private System.Windows.Forms.Button btnLogin;
+        private System.Windows.Forms.Button btnLogout;
+        private System.Windows.Forms.Button btnUsers;
+        private System.Windows.Forms.Panel pnlContent;
+        private System.Windows.Forms.Panel pnlSessionCard;
+        private System.Windows.Forms.Label lblSessionHeader;
+        private System.Windows.Forms.Label lblStatusBadge;
+        private System.Windows.Forms.Label lblUsernameValue;
+        private System.Windows.Forms.Label lblUsernameLabel;
+        private System.Windows.Forms.Label lblFullNameValue;
+        private System.Windows.Forms.Label lblFullNameLabel;
+        private System.Windows.Forms.Panel pnlDivider;
+        private System.Windows.Forms.ListBox lstUserPermissions;
+        private System.Windows.Forms.Label lblPermissionsHeader;
+    }
+}

UserPermissionTest_CS_WinForms/MainForm.cs

@@ -0,0 +1,153 @@
+using System;
+using System.Drawing;
+using System.Windows.Forms;
+
+namespace UserPermissionTest_CS_WinForms
+{
+    public partial class MainForm : Form
+    {
+        public MainForm()
+        {
+            InitializeComponent();
+        }
+
+        private void MainForm_Load(object sender, EventArgs e)
+        {
+            // Subscribe to session state change notifications
+            SessionManager.SessionStateChanged += UpdateSessionUi;
+            
+            // Trigger initial UI update
+            UpdateSessionUi();
+        }
+
+        private void UpdateSessionUi()
+        {
+            if (this.InvokeRequired)
+            {
+                this.Invoke(new Action(UpdateSessionUi));
+                return;
+            }
+
+            var user = SessionManager.CurrentUser;
+
+            if (user == null)
+            {
+                // Signed Out State
+                lblStatusBadge.Text = "SIGNED OUT";
+                lblStatusBadge.BackColor = Color.FromArgb(239, 68, 68); // Red
+                lblUsernameValue.Text = "Not Logged In";
+                lblUsernameValue.ForeColor = Color.FromArgb(100, 116, 139); // Slate-400
+                lblFullNameValue.Text = "-";
+                
+                lstUserPermissions.Items.Clear();
+                lstUserPermissions.Items.Add("(Sign in to view permissions)");
+
+                btnLogin.Enabled = true;
+                btnLogout.Enabled = false;
+                
+                // Authorization: Lock directory when not logged in
+                btnUsers.Enabled = false;
+                btnUsers.Text = "🔒 Manage Users";
+                btnUsers.BackColor = Color.FromArgb(241, 245, 249);
+            }
+            else
+            {
+                // Signed In State
+                lblStatusBadge.Text = "SIGNED IN";
+                lblStatusBadge.BackColor = Color.FromArgb(16, 185, 129); // Green
+                lblUsernameValue.Text = user.Username;
+                lblUsernameValue.ForeColor = Color.FromArgb(15, 23, 42); // Navy-900
+                lblFullNameValue.Text = user.FullName;
+
+                lstUserPermissions.Items.Clear();
+                if (user.Permissions.Count == 0)
+                {
+                    lstUserPermissions.Items.Add("(No permissions assigned)");
+                }
+                else
+                {
+                    foreach (var permission in user.Permissions)
+                    {
+                        lstUserPermissions.Items.Add("✓ " + permission);
+                    }
+                }
+
+                btnLogin.Enabled = false;
+                btnLogout.Enabled = true;
+
+                // Authorization: Check if user has 'Manage Users' or 'Full Control'
+                bool hasAccess = user.Permissions.Contains("Manage Users") || user.Permissions.Contains("Full Control");
+                if (hasAccess)
+                {
+                    btnUsers.Enabled = true;
+                    btnUsers.Text = "👥 Manage Users";
+                    btnUsers.BackColor = Color.FromArgb(241, 245, 249);
+                }
+                else
+                {
+                    btnUsers.Enabled = false;
+                    btnUsers.Text = "🔒 Manage Users (Locked)";
+                    btnUsers.BackColor = Color.FromArgb(241, 245, 249);
+                }
+            }
+        }
+
+        private void btnLogin_Click(object sender, EventArgs e)
+        {
+            using (var loginDialog = new LoginDialog())
+            {
+                if (loginDialog.ShowDialog(this) == DialogResult.OK)
+                {
+                    MessageBox.Show(
+                        $"Welcome back, {SessionManager.CurrentUser?.FullName}!", 
+                        "Sign In Successful", 
+                        MessageBoxButtons.OK, 
+                        MessageBoxIcon.Information);
+                }
+            }
+        }
+
+        private void btnLogout_Click(object sender, EventArgs e)
+        {
+            if (SessionManager.CurrentUser != null)
+            {
+                string username = SessionManager.CurrentUser.Username;
+                SessionManager.Logout();
+                MessageBox.Show(
+                    $"User '{username}' has been successfully logged out.", 
+                    "Signed Out", 
+                    MessageBoxButtons.OK, 
+                    MessageBoxIcon.Information);
+            }
+        }
+
+        private void btnUsers_Click(object sender, EventArgs e)
+        {
+            var user = SessionManager.CurrentUser;
+            if (user == null || (!user.Permissions.Contains("Manage Users") && !user.Permissions.Contains("Full Control")))
+            {
+                MessageBox.Show(
+                    "Security Exception: You do not possess the required credentials ('Manage Users' or 'Full Control') to access directory configuration.", 
+                    "Access Denied", 
+                    MessageBoxButtons.OK, 
+                    MessageBoxIcon.Stop);
+                return;
+            }
+
+            using (var userSettings = new UserSettings())
+            {
+                userSettings.ShowDialog(this);
+            }
+            
+            // After closing settings, refresh the session UI (in case the current user's profile was changed)
+            UpdateSessionUi();
+        }
+
+        protected override void OnFormClosing(FormClosingEventArgs e)
+        {
+            // Unsubscribe to prevent reference leaks
+            SessionManager.SessionStateChanged -= UpdateSessionUi;
+            base.OnFormClosing(e);
+        }
+    }
+}

UserPermissionTest_CS_WinForms/PasswordHasher.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace UserPermissionTest_CS_WinForms
+{
+    public static class PasswordHasher
+    {
+        /// <summary>
+        /// Hashes the plain-text password using SHA-256.
+        /// </summary>
+        public static string HashPassword(string password)
+        {
+            if (password == null) throw new ArgumentNullException(nameof(password));
+
+            using (SHA256 sha256 = SHA256.Create())
+            {
+                byte[] bytes = sha256.ComputeHash(Encoding.UTF8.GetBytes(password));
+                StringBuilder builder = new StringBuilder();
+                for (int i = 0; i < bytes.Length; i++)
+                {
+                    builder.Append(bytes[i].ToString("x2"));
+                }
+                return builder.ToString();
+            }
+        }
+
+        /// <summary>
+        /// Verifies whether the entered plain-text password matches the stored SHA-256 hash.
+        /// </summary>
+        public static bool VerifyPassword(string enteredPassword, string storedHash)
+        {
+            if (enteredPassword == null || storedHash == null) return false;
+
+            string hashedInput = HashPassword(enteredPassword);
+            return hashedInput.Equals(storedHash, StringComparison.OrdinalIgnoreCase);
+        }
+    }
+}

UserPermissionTest_CS_WinForms/Program.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Windows.Forms;
+
+namespace UserPermissionTest_CS_WinForms
+{
+    static class Program
+    {
+        [STAThread]
+        static void Main()
+        {
+            Application.EnableVisualStyles();
+            Application.SetCompatibleTextRenderingDefault(false);
+            Application.Run(new MainForm());
+        }
+    }
+}

UserPermissionTest_CS_WinForms/SessionManager.cs

@@ -0,0 +1,101 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace UserPermissionTest_CS_WinForms
+{
+    public static class SessionManager
+    {
+        private static readonly IUserRepository UserRepository = new JsonUserRepository();
+
+        public static User? CurrentUser { get; private set; }
+        
+        public static List<User> Users { get; private set; } = new List<User>();
+        
+        public static List<string> AvailablePermissions { get; private set; } = new List<string>();
+
+        public static event Action? SessionStateChanged;
+        public static event Action? UsersUpdated;
+
+        static SessionManager()
+        {
+            // Load state from repository
+            Users = UserRepository.LoadUsers();
+            AvailablePermissions = UserRepository.LoadPermissions();
+        }
+
+        public static bool Login(string username, string password)
+        {
+            var user = Users.FirstOrDefault(u => 
+                u.Username.Equals(username, StringComparison.OrdinalIgnoreCase));
+
+            if (user != null && PasswordHasher.VerifyPassword(password, user.Password))
+            {
+                CurrentUser = user;
+                SessionStateChanged?.Invoke();
+                return true;
+            }
+            return false;
+        }
+
+        public static void Logout()
+        {
+            if (CurrentUser != null)
+            {
+                CurrentUser = null;
+                SessionStateChanged?.Invoke();
+            }
+        }
+
+        public static void AddUser(User user)
+        {
+            Users.Add(user);
+            UserRepository.SaveUsers(Users);
+            UsersUpdated?.Invoke();
+        }
+
+        public static void UpdateUser(string oldUsername, User updatedUser)
+        {
+            var index = Users.FindIndex(u => u.Username.Equals(oldUsername, StringComparison.OrdinalIgnoreCase));
+            if (index >= 0)
+            {
+                Users[index] = updatedUser;
+                // If updated user is currently logged in, update current user too
+                if (CurrentUser != null && CurrentUser.Username.Equals(oldUsername, StringComparison.OrdinalIgnoreCase))
+                {
+                    CurrentUser = updatedUser;
+                    SessionStateChanged?.Invoke();
+                }
+                UserRepository.SaveUsers(Users);
+                UsersUpdated?.Invoke();
+            }
+        }
+
+        public static void DeleteUser(string username)
+        {
+            var user = Users.FirstOrDefault(u => u.Username.Equals(username, StringComparison.OrdinalIgnoreCase));
+            if (user != null)
+            {
+                Users.Remove(user);
+                // If deleted user is logged in, log out
+                if (CurrentUser != null && CurrentUser.Username.Equals(username, StringComparison.OrdinalIgnoreCase))
+                {
+                    CurrentUser = null;
+                    SessionStateChanged?.Invoke();
+                }
+                UserRepository.SaveUsers(Users);
+                UsersUpdated?.Invoke();
+            }
+        }
+
+        public static void AddPermission(string permission)
+        {
+            if (!AvailablePermissions.Contains(permission))
+            {
+                AvailablePermissions.Add(permission);
+                UserRepository.SavePermissions(AvailablePermissions);
+                UsersUpdated?.Invoke();
+            }
+        }
+    }
+}

UserPermissionTest_CS_WinForms/User.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+
+namespace UserPermissionTest_CS_WinForms
+{
+    public class User
+    {
+        public string Username { get; set; } = string.Empty;
+        public string FullName { get; set; } = string.Empty;
+        public string Password { get; set; } = string.Empty;
+        public List<string> Permissions { get; set; } = new List<string>();
+
+        public User Clone()
+        {
+            return new User
+            {
+                Username = this.Username,
+                FullName = this.FullName,
+                Password = this.Password,
+                Permissions = new List<string>(this.Permissions)
+            };
+        }
+    }
+}

UserPermissionTest_CS_WinForms/UserPermissionTest_CS_WinForms.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net481</TargetFramework>
+    <UseWindowsForms>true</UseWindowsForms>
+    <LangVersion>latest</LangVersion>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
+  </ItemGroup>
+
+</Project>

UserPermissionTest_CS_WinForms/UserSettings.Designer.cs

@@ -0,0 +1,402 @@
+namespace UserPermissionTest_CS_WinForms
+{
+    partial class UserSettings
+    {
+        private System.ComponentModel.IContainer components = null;
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        private void InitializeComponent()
+        {
+            this.pnlHeader = new System.Windows.Forms.Panel();
+            this.lblTitle = new System.Windows.Forms.Label();
+            this.lblSubtitle = new System.Windows.Forms.Label();
+            this.splitContainer = new System.Windows.Forms.SplitContainer();
+            this.btnDeleteUser = new System.Windows.Forms.Button();
+            this.btnAddUser = new System.Windows.Forms.Button();
+            this.lstUsers = new System.Windows.Forms.ListBox();
+            this.lblUsersList = new System.Windows.Forms.Label();
+            this.grpPermissions = new System.Windows.Forms.GroupBox();
+            this.btnAddNewPermission = new System.Windows.Forms.Button();
+            this.txtNewPermission = new System.Windows.Forms.TextBox();
+            this.lblNewPermission = new System.Windows.Forms.Label();
+            this.chkPermissions = new System.Windows.Forms.CheckedListBox();
+            this.btnSaveUser = new System.Windows.Forms.Button();
+            this.txtPassword = new System.Windows.Forms.TextBox();
+            this.btnTogglePassword = new System.Windows.Forms.Button();
+            this.lblPassword = new System.Windows.Forms.Label();
+            this.txtFullName = new System.Windows.Forms.TextBox();
+            this.lblFullName = new System.Windows.Forms.Label();
+            this.txtUsername = new System.Windows.Forms.TextBox();
+            this.lblUsername = new System.Windows.Forms.Label();
+            this.lblDetailsHeader = new System.Windows.Forms.Label();
+            this.pnlHeader.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)(this.splitContainer)).BeginInit();
+            this.splitContainer.Panel1.SuspendLayout();
+            this.splitContainer.Panel2.SuspendLayout();
+            this.splitContainer.SuspendLayout();
+            this.grpPermissions.SuspendLayout();
+            this.SuspendLayout();
+            // 
+            // pnlHeader
+            // 
+            this.pnlHeader.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(30)))), ((int)(((byte)(41)))), ((int)(((byte)(59)))));
+            this.pnlHeader.Controls.Add(this.lblTitle);
+            this.pnlHeader.Controls.Add(this.lblSubtitle);
+            this.pnlHeader.Dock = System.Windows.Forms.DockStyle.Top;
+            this.pnlHeader.Location = new System.Drawing.Point(0, 0);
+            this.pnlHeader.Name = "pnlHeader";
+            this.pnlHeader.Size = new System.Drawing.Size(834, 80);
+            this.pnlHeader.TabIndex = 0;
+            // 
+            // lblTitle
+            // 
+            this.lblTitle.AutoSize = true;
+            this.lblTitle.Font = new System.Drawing.Font("Segoe UI Semibold", 16F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblTitle.ForeColor = System.Drawing.Color.White;
+            this.lblTitle.Location = new System.Drawing.Point(20, 15);
+            this.lblTitle.Name = "lblTitle";
+            this.lblTitle.Size = new System.Drawing.Size(262, 30);
+            this.lblTitle.TabIndex = 0;
+            this.lblTitle.Text = "UserSettings && Directory";
+            // 
+            // lblSubtitle
+            // 
+            this.lblSubtitle.AutoSize = true;
+            this.lblSubtitle.Font = new System.Drawing.Font("Segoe UI", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblSubtitle.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(148)))), ((int)(((byte)(163)))), ((int)(((byte)(184)))));
+            this.lblSubtitle.Location = new System.Drawing.Point(22, 45);
+            this.lblSubtitle.Name = "lblSubtitle";
+            this.lblSubtitle.Size = new System.Drawing.Size(325, 15);
+            this.lblSubtitle.TabIndex = 1;
+            this.lblSubtitle.Text = "Manage user credentials, personal details, and security roles.";
+            // 
+            // splitContainer
+            // 
+            this.splitContainer.Dock = System.Windows.Forms.DockStyle.Fill;
+            this.splitContainer.Location = new System.Drawing.Point(0, 80);
+            this.splitContainer.Name = "splitContainer";
+            // 
+            // splitContainer.Panel1
+            // 
+            this.splitContainer.Panel1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(248)))), ((int)(((byte)(250)))), ((int)(((byte)(252)))));
+            this.splitContainer.Panel1.Controls.Add(this.btnDeleteUser);
+            this.splitContainer.Panel1.Controls.Add(this.btnAddUser);
+            this.splitContainer.Panel1.Controls.Add(this.lstUsers);
+            this.splitContainer.Panel1.Controls.Add(this.lblUsersList);
+            this.splitContainer.Panel1.Padding = new System.Windows.Forms.Padding(15);
+            // 
+            // splitContainer.Panel2
+            // 
+            this.splitContainer.Panel2.BackColor = System.Drawing.Color.White;
+            this.splitContainer.Panel2.Controls.Add(this.grpPermissions);
+            this.splitContainer.Panel2.Controls.Add(this.btnSaveUser);
+            this.splitContainer.Panel2.Controls.Add(this.txtPassword);
+            this.splitContainer.Panel2.Controls.Add(this.btnTogglePassword);
+            this.splitContainer.Panel2.Controls.Add(this.lblPassword);
+            this.splitContainer.Panel2.Controls.Add(this.txtFullName);
+            this.splitContainer.Panel2.Controls.Add(this.lblFullName);
+            this.splitContainer.Panel2.Controls.Add(this.txtUsername);
+            this.splitContainer.Panel2.Controls.Add(this.lblUsername);
+            this.splitContainer.Panel2.Controls.Add(this.lblDetailsHeader);
+            this.splitContainer.Panel2.Padding = new System.Windows.Forms.Padding(20);
+            this.splitContainer.Size = new System.Drawing.Size(834, 461);
+            this.splitContainer.SplitterDistance = 250;
+            this.splitContainer.TabIndex = 1;
+            // 
+            // btnDeleteUser
+            // 
+            this.btnDeleteUser.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(254)))), ((int)(((byte)(242)))), ((int)(((byte)(242)))));
+            this.btnDeleteUser.Cursor = System.Windows.Forms.Cursors.Hand;
+            this.btnDeleteUser.FlatAppearance.BorderSize = 0;
+            this.btnDeleteUser.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
+            this.btnDeleteUser.Font = new System.Drawing.Font("Segoe UI Semibold", 9F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.btnDeleteUser.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(239)))), ((int)(((byte)(68)))), ((int)(((byte)(68)))));
+            this.btnDeleteUser.Location = new System.Drawing.Point(130, 410);
+            this.btnDeleteUser.Name = "btnDeleteUser";
+            this.btnDeleteUser.Size = new System.Drawing.Size(105, 36);
+            this.btnDeleteUser.TabIndex = 3;
+            this.btnDeleteUser.Text = "Delete User";
+            this.btnDeleteUser.UseVisualStyleBackColor = false;
+            this.btnDeleteUser.Click += new System.EventHandler(this.btnDeleteUser_Click);
+            // 
+            // btnAddUser
+            // 
+            this.btnAddUser.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(99)))), ((int)(((byte)(102)))), ((int)(((byte)(241)))));
+            this.btnAddUser.Cursor = System.Windows.Forms.Cursors.Hand;
+            this.btnAddUser.FlatAppearance.BorderSize = 0;
+            this.btnAddUser.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
+            this.btnAddUser.Font = new System.Drawing.Font("Segoe UI Semibold", 9F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.btnAddUser.ForeColor = System.Drawing.Color.White;
+            this.btnAddUser.Location = new System.Drawing.Point(15, 410);
+            this.btnAddUser.Name = "btnAddUser";
+            this.btnAddUser.Size = new System.Drawing.Size(105, 36);
+            this.btnAddUser.TabIndex = 2;
+            this.btnAddUser.Text = "+ Add User";
+            this.btnAddUser.UseVisualStyleBackColor = false;
+            this.btnAddUser.Click += new System.EventHandler(this.btnAddUser_Click);
+            // 
+            // lstUsers
+            // 
+            this.lstUsers.BackColor = System.Drawing.Color.White;
+            this.lstUsers.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
+            this.lstUsers.Font = new System.Drawing.Font("Segoe UI", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lstUsers.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(15)))), ((int)(((byte)(23)))), ((int)(((byte)(42)))));
+            this.lstUsers.FormattingEnabled = true;
+            this.lstUsers.ItemHeight = 17;
+            this.lstUsers.Location = new System.Drawing.Point(15, 40);
+            this.lstUsers.Name = "lstUsers";
+            this.lstUsers.Size = new System.Drawing.Size(220, 359);
+            this.lstUsers.TabIndex = 1;
+            this.lstUsers.SelectedIndexChanged += new System.EventHandler(this.lstUsers_SelectedIndexChanged);
+            // 
+            // lblUsersList
+            // 
+            this.lblUsersList.AutoSize = true;
+            this.lblUsersList.Font = new System.Drawing.Font("Segoe UI Semibold", 11F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblUsersList.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(51)))), ((int)(((byte)(65)))), ((int)(((byte)(85)))));
+            this.lblUsersList.Location = new System.Drawing.Point(15, 12);
+            this.lblUsersList.Name = "lblUsersList";
+            this.lblUsersList.Size = new System.Drawing.Size(114, 20);
+            this.lblUsersList.TabIndex = 0;
+            this.lblUsersList.Text = "Users Directory";
+            // 
+            // grpPermissions
+            // 
+            this.grpPermissions.Controls.Add(this.btnAddNewPermission);
+            this.grpPermissions.Controls.Add(this.txtNewPermission);
+            this.grpPermissions.Controls.Add(this.lblNewPermission);
+            this.grpPermissions.Controls.Add(this.chkPermissions);
+            this.grpPermissions.Font = new System.Drawing.Font("Segoe UI Semibold", 9.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.grpPermissions.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(51)))), ((int)(((byte)(65)))), ((int)(((byte)(85)))));
+            this.grpPermissions.Location = new System.Drawing.Point(240, 50);
+            this.grpPermissions.Name = "grpPermissions";
+            this.grpPermissions.Size = new System.Drawing.Size(320, 335);
+            this.grpPermissions.TabIndex = 8;
+            this.grpPermissions.TabStop = false;
+            this.grpPermissions.Text = "User Permissions";
+            // 
+            // btnAddNewPermission
+            // 
+            this.btnAddNewPermission.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(241)))), ((int)(((byte)(245)))), ((int)(((byte)(249)))));
+            this.btnAddNewPermission.Cursor = System.Windows.Forms.Cursors.Hand;
+            this.btnAddNewPermission.FlatAppearance.BorderSize = 0;
+            this.btnAddNewPermission.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
+            this.btnAddNewPermission.Font = new System.Drawing.Font("Segoe UI Semibold", 9F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.btnAddNewPermission.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(71)))), ((int)(((byte)(85)))), ((int)(((byte)(105)))));
+            this.btnAddNewPermission.Location = new System.Drawing.Point(240, 292);
+            this.btnAddNewPermission.Name = "btnAddNewPermission";
+            this.btnAddNewPermission.Size = new System.Drawing.Size(65, 27);
+            this.btnAddNewPermission.TabIndex = 3;
+            this.btnAddNewPermission.Text = "Add";
+            this.btnAddNewPermission.UseVisualStyleBackColor = false;
+            this.btnAddNewPermission.Click += new System.EventHandler(this.btnAddNewPermission_Click);
+            // 
+            // txtNewPermission
+            // 
+            this.txtNewPermission.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(248)))), ((int)(((byte)(250)))), ((int)(((byte)(252)))));
+            this.txtNewPermission.Font = new System.Drawing.Font("Segoe UI", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.txtNewPermission.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(15)))), ((int)(((byte)(23)))), ((int)(((byte)(42)))));
+            this.txtNewPermission.Location = new System.Drawing.Point(15, 293);
+            this.txtNewPermission.Name = "txtNewPermission";
+            this.txtNewPermission.Size = new System.Drawing.Size(220, 25);
+            this.txtNewPermission.TabIndex = 2;
+            // 
+            // lblNewPermission
+            // 
+            this.lblNewPermission.AutoSize = true;
+            this.lblNewPermission.Font = new System.Drawing.Font("Segoe UI", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblNewPermission.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(100)))), ((int)(((byte)(116)))), ((int)(((byte)(139)))));
+            this.lblNewPermission.Location = new System.Drawing.Point(15, 275);
+            this.lblNewPermission.Name = "lblNewPermission";
+            this.lblNewPermission.Size = new System.Drawing.Size(127, 13);
+            this.lblNewPermission.TabIndex = 1;
+            this.lblNewPermission.Text = "Define New Permission:";
+            // 
+            // chkPermissions
+            // 
+            this.chkPermissions.BackColor = System.Drawing.Color.White;
+            this.chkPermissions.BorderStyle = System.Windows.Forms.BorderStyle.None;
+            this.chkPermissions.CheckOnClick = true;
+            this.chkPermissions.Font = new System.Drawing.Font("Segoe UI", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.chkPermissions.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(15)))), ((int)(((byte)(23)))), ((int)(((byte)(42)))));
+            this.chkPermissions.FormattingEnabled = true;
+            this.chkPermissions.Location = new System.Drawing.Point(15, 25);
+            this.chkPermissions.Name = "chkPermissions";
+            this.chkPermissions.Size = new System.Drawing.Size(290, 240);
+            this.chkPermissions.TabIndex = 0;
+            // 
+            // btnSaveUser
+            // 
+            this.btnSaveUser.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(16)))), ((int)(((byte)(185)))), ((int)(((byte)(129)))));
+            this.btnSaveUser.Cursor = System.Windows.Forms.Cursors.Hand;
+            this.btnSaveUser.FlatAppearance.BorderSize = 0;
+            this.btnSaveUser.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
+            this.btnSaveUser.Font = new System.Drawing.Font("Segoe UI Semibold", 10F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.btnSaveUser.ForeColor = System.Drawing.Color.White;
+            this.btnSaveUser.Location = new System.Drawing.Point(20, 395);
+            this.btnSaveUser.Name = "btnSaveUser";
+            this.btnSaveUser.Size = new System.Drawing.Size(540, 40);
+            this.btnSaveUser.TabIndex = 7;
+            this.btnSaveUser.Text = "Save Profile Changes";
+            this.btnSaveUser.UseVisualStyleBackColor = false;
+            this.btnSaveUser.Click += new System.EventHandler(this.btnSaveUser_Click);
+            // 
+            // txtPassword
+            // 
+            this.txtPassword.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(248)))), ((int)(((byte)(250)))), ((int)(((byte)(252)))));
+            this.txtPassword.Font = new System.Drawing.Font("Segoe UI", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.txtPassword.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(15)))), ((int)(((byte)(23)))), ((int)(((byte)(42)))));
+            this.txtPassword.Location = new System.Drawing.Point(20, 205);
+            this.txtPassword.Name = "txtPassword";
+            this.txtPassword.PasswordChar = '•';
+            this.txtPassword.Size = new System.Drawing.Size(165, 25);
+            this.txtPassword.TabIndex = 6;
+            // 
+            // btnTogglePassword
+            // 
+            this.btnTogglePassword.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(241)))), ((int)(((byte)(245)))), ((int)(((byte)(249)))));
+            this.btnTogglePassword.Cursor = System.Windows.Forms.Cursors.Hand;
+            this.btnTogglePassword.FlatAppearance.BorderSize = 0;
+            this.btnTogglePassword.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
+            this.btnTogglePassword.Font = new System.Drawing.Font("Segoe UI", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.btnTogglePassword.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(71)))), ((int)(((byte)(85)))), ((int)(((byte)(105)))));
+            this.btnTogglePassword.Location = new System.Drawing.Point(190, 205);
+            this.btnTogglePassword.Name = "btnTogglePassword";
+            this.btnTogglePassword.Size = new System.Drawing.Size(30, 25);
+            this.btnTogglePassword.TabIndex = 9;
+            this.btnTogglePassword.Text = "👁";
+            this.btnTogglePassword.UseVisualStyleBackColor = false;
+            this.btnTogglePassword.Click += new System.EventHandler(this.btnTogglePassword_Click);
+            // 
+            // lblPassword
+            // 
+            this.lblPassword.AutoSize = true;
+            this.lblPassword.Font = new System.Drawing.Font("Segoe UI Semibold", 9.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblPassword.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(71)))), ((int)(((byte)(85)))), ((int)(((byte)(105)))));
+            this.lblPassword.Location = new System.Drawing.Point(20, 185);
+            this.lblPassword.Name = "lblPassword";
+            this.lblPassword.Size = new System.Drawing.Size(66, 17);
+            this.lblPassword.TabIndex = 5;
+            this.lblPassword.Text = "Password";
+            // 
+            // txtFullName
+            // 
+            this.txtFullName.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(248)))), ((int)(((byte)(250)))), ((int)(((byte)(252)))));
+            this.txtFullName.Font = new System.Drawing.Font("Segoe UI", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.txtFullName.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(15)))), ((int)(((byte)(23)))), ((int)(((byte)(42)))));
+            this.txtFullName.Location = new System.Drawing.Point(20, 145);
+            this.txtFullName.Name = "txtFullName";
+            this.txtFullName.Size = new System.Drawing.Size(200, 25);
+            this.txtFullName.TabIndex = 4;
+            // 
+            // lblFullName
+            // 
+            this.lblFullName.AutoSize = true;
+            this.lblFullName.Font = new System.Drawing.Font("Segoe UI Semibold", 9.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblFullName.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(71)))), ((int)(((byte)(85)))), ((int)(((byte)(105)))));
+            this.lblFullName.Location = new System.Drawing.Point(20, 125);
+            this.lblFullName.Name = "lblFullName";
+            this.lblFullName.Size = new System.Drawing.Size(69, 17);
+            this.lblFullName.TabIndex = 3;
+            this.lblFullName.Text = "Full Name";
+            // 
+            // txtUsername
+            // 
+            this.txtUsername.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(248)))), ((int)(((byte)(250)))), ((int)(((byte)(252)))));
+            this.txtUsername.Font = new System.Drawing.Font("Segoe UI", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.txtUsername.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(15)))), ((int)(((byte)(23)))), ((int)(((byte)(42)))));
+            this.txtUsername.Location = new System.Drawing.Point(20, 85);
+            this.txtUsername.Name = "txtUsername";
+            this.txtUsername.Size = new System.Drawing.Size(200, 25);
+            this.txtUsername.TabIndex = 2;
+            // 
+            // lblUsername
+            // 
+            this.lblUsername.AutoSize = true;
+            this.lblUsername.Font = new System.Drawing.Font("Segoe UI Semibold", 9.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblUsername.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(71)))), ((int)(((byte)(85)))), ((int)(((byte)(105)))));
+            this.lblUsername.Location = new System.Drawing.Point(20, 65);
+            this.lblUsername.Name = "lblUsername";
+            this.lblUsername.Size = new System.Drawing.Size(75, 17);
+            this.lblUsername.TabIndex = 1;
+            this.lblUsername.Text = "User Name";
+            // 
+            // lblDetailsHeader
+            // 
+            this.lblDetailsHeader.AutoSize = true;
+            this.lblDetailsHeader.Font = new System.Drawing.Font("Segoe UI Semibold", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.lblDetailsHeader.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(30)))), ((int)(((byte)(41)))), ((int)(((byte)(59)))));
+            this.lblDetailsHeader.Location = new System.Drawing.Point(16, 12);
+            this.lblDetailsHeader.Name = "lblDetailsHeader";
+            this.lblDetailsHeader.Size = new System.Drawing.Size(150, 21);
+            this.lblDetailsHeader.TabIndex = 0;
+            this.lblDetailsHeader.Text = "User Profile Details";
+            // 
+            // UserSettings
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.BackColor = System.Drawing.Color.White;
+            this.ClientSize = new System.Drawing.Size(834, 541);
+            this.Controls.Add(this.splitContainer);
+            this.Controls.Add(this.pnlHeader);
+            this.Font = new System.Drawing.Font("Segoe UI", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
+            this.MaximizeBox = false;
+            this.MinimizeBox = false;
+            this.Name = "UserSettings";
+            this.ShowIcon = false;
+            this.ShowInTaskbar = false;
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
+            this.Text = "Directory & Security Manager";
+            this.Load += new System.EventHandler(this.UserSettings_Load);
+            this.pnlHeader.ResumeLayout(false);
+            this.pnlHeader.PerformLayout();
+            this.splitContainer.Panel1.ResumeLayout(false);
+            this.splitContainer.Panel1.PerformLayout();
+            this.splitContainer.Panel2.ResumeLayout(false);
+            this.splitContainer.Panel2.PerformLayout();
+            ((System.ComponentModel.ISupportInitialize)(this.splitContainer)).EndInit();
+            this.splitContainer.ResumeLayout(false);
+            this.grpPermissions.ResumeLayout(false);
+            this.grpPermissions.PerformLayout();
+            this.ResumeLayout(false);
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.Panel pnlHeader;
+        private System.Windows.Forms.Label lblTitle;
+        private System.Windows.Forms.Label lblSubtitle;
+        private System.Windows.Forms.SplitContainer splitContainer;
+        private System.Windows.Forms.Label lblUsersList;
+        private System.Windows.Forms.ListBox lstUsers;
+        private System.Windows.Forms.Button btnDeleteUser;
+        private System.Windows.Forms.Button btnAddUser;
+        private System.Windows.Forms.Label lblDetailsHeader;
+        private System.Windows.Forms.TextBox txtUsername;
+        private System.Windows.Forms.Label lblUsername;
+        private System.Windows.Forms.TextBox txtPassword;
+        private System.Windows.Forms.Label lblPassword;
+        private System.Windows.Forms.TextBox txtFullName;
+        private System.Windows.Forms.Label lblFullName;
+        private System.Windows.Forms.Button btnSaveUser;
+        private System.Windows.Forms.GroupBox grpPermissions;
+        private System.Windows.Forms.CheckedListBox chkPermissions;
+        private System.Windows.Forms.Button btnAddNewPermission;
+        private System.Windows.Forms.TextBox txtNewPermission;
+        private System.Windows.Forms.Label lblNewPermission;
+        private System.Windows.Forms.Button btnTogglePassword;
+    }
+}

UserPermissionTest_CS_WinForms/UserSettings.cs

@@ -0,0 +1,385 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Windows.Forms;
+
+namespace UserPermissionTest_CS_WinForms
+{
+    public partial class UserSettings : Form
+    {
+        private string? _editingUsername = null; // null means we are adding a new user, otherwise contains the original username of the user being edited.
+        private bool _isPopulatingFields = false;
+
+        public UserSettings()
+        {
+            InitializeComponent();
+        }
+
+        private void UserSettings_Load(object sender, EventArgs e)
+        {
+            RefreshUserList();
+            
+            // Register to updates to keep UI synchronized in real-time
+            SessionManager.UsersUpdated += SessionManager_UsersUpdated;
+
+            if (lstUsers.Items.Count > 0)
+            {
+                lstUsers.SelectedIndex = 0;
+            }
+            else
+            {
+                ClearDetailsForm();
+            }
+        }
+
+        private void SessionManager_UsersUpdated()
+        {
+            // Safeguard for cross-thread calls, though in WinForms it's usually on the UI thread
+            if (this.InvokeRequired)
+            {
+                this.Invoke(new Action(RefreshUserList));
+            }
+            else
+            {
+                RefreshUserList();
+            }
+        }
+
+        private void RefreshUserList()
+        {
+            _isPopulatingFields = true;
+            
+            string? currentSelection = lstUsers.SelectedItem?.ToString();
+            lstUsers.Items.Clear();
+
+            foreach (var user in SessionManager.Users)
+            {
+                lstUsers.Items.Add(user.Username);
+            }
+
+            // Restore selection if possible
+            if (currentSelection != null && lstUsers.Items.Contains(currentSelection))
+            {
+                lstUsers.SelectedItem = currentSelection;
+            }
+            else if (lstUsers.Items.Count > 0)
+            {
+                lstUsers.SelectedIndex = 0;
+            }
+            else
+            {
+                ClearDetailsForm();
+            }
+
+            _isPopulatingFields = false;
+            RefreshPermissionList();
+        }
+
+        private void RefreshPermissionList()
+        {
+            // Save currently checked permissions
+            var checkedPerms = new HashSet<string>();
+            for (int i = 0; i < chkPermissions.Items.Count; i++)
+            {
+                if (chkPermissions.GetItemChecked(i))
+                {
+                    string? itemText = chkPermissions.Items[i]?.ToString();
+                    if (itemText != null)
+                    {
+                        checkedPerms.Add(itemText);
+                    }
+                }
+            }
+
+            chkPermissions.Items.Clear();
+            foreach (var permission in SessionManager.AvailablePermissions)
+            {
+                chkPermissions.Items.Add(permission);
+            }
+
+            // If we are editing a user, check their specific permissions
+            if (_editingUsername != null)
+            {
+                var user = SessionManager.Users.FirstOrDefault(u => u.Username.Equals(_editingUsername, StringComparison.OrdinalIgnoreCase));
+                if (user != null)
+                {
+                    for (int i = 0; i < chkPermissions.Items.Count; i++)
+                    {
+                        string? permissionName = chkPermissions.Items[i].ToString();
+                        if (permissionName != null && user.Permissions.Contains(permissionName))
+                        {
+                            chkPermissions.SetItemChecked(i, true);
+                        }
+                    }
+                }
+            }
+            else
+            {
+                // Otherwise, restore the checks that the administrator was in the middle of selecting
+                for (int i = 0; i < chkPermissions.Items.Count; i++)
+                {
+                    string? permissionName = chkPermissions.Items[i].ToString();
+                    if (permissionName != null && checkedPerms.Contains(permissionName))
+                    {
+                        chkPermissions.SetItemChecked(i, true);
+                    }
+                }
+            }
+        }
+
+        private void lstUsers_SelectedIndexChanged(object sender, EventArgs e)
+        {
+            if (_isPopulatingFields) return;
+
+            string? selectedUsername = lstUsers.SelectedItem?.ToString();
+            if (selectedUsername != null)
+            {
+                var user = SessionManager.Users.FirstOrDefault(u => u.Username.Equals(selectedUsername, StringComparison.OrdinalIgnoreCase));
+                if (user != null)
+                {
+                    PopulateUserDetails(user);
+                }
+            }
+            else
+            {
+                ClearDetailsForm();
+            }
+        }
+
+        private void PopulateUserDetails(User user)
+        {
+            _isPopulatingFields = true;
+            _editingUsername = user.Username;
+
+            txtUsername.Text = user.Username;
+            txtFullName.Text = user.FullName;
+            
+            // Mask the actual password on display with a special visual placeholder
+            txtPassword.Text = "●●●●●●●●";
+            txtPassword.PasswordChar = '•';
+            btnTogglePassword.Text = "👁";
+
+            // Update permissions CheckedListBox
+            for (int i = 0; i < chkPermissions.Items.Count; i++)
+            {
+                string? permissionName = chkPermissions.Items[i].ToString();
+                bool hasPermission = permissionName != null && user.Permissions.Contains(permissionName);
+                chkPermissions.SetItemChecked(i, hasPermission);
+            }
+
+            lblDetailsHeader.Text = $"User Profile: {user.Username}";
+            btnDeleteUser.Enabled = true;
+            _isPopulatingFields = false;
+        }
+
+        private void ClearDetailsForm()
+        {
+            _isPopulatingFields = true;
+            _editingUsername = null;
+
+            txtUsername.Text = string.Empty;
+            txtFullName.Text = string.Empty;
+            txtPassword.Text = string.Empty;
+            txtPassword.PasswordChar = '•';
+            btnTogglePassword.Text = "👁";
+
+            for (int i = 0; i < chkPermissions.Items.Count; i++)
+            {
+                chkPermissions.SetItemChecked(i, false);
+            }
+
+            lblDetailsHeader.Text = "New User Profile Setup";
+            btnDeleteUser.Enabled = false;
+            _isPopulatingFields = false;
+        }
+
+        private void btnAddUser_Click(object sender, EventArgs e)
+        {
+            lstUsers.ClearSelected();
+            ClearDetailsForm();
+            txtUsername.Focus();
+        }
+
+        private void btnDeleteUser_Click(object sender, EventArgs e)
+        {
+            if (_editingUsername == null) return;
+
+            var result = MessageBox.Show(
+                $"Are you sure you want to delete the user '{_editingUsername}'?", 
+                "Confirm Deletion", 
+                MessageBoxButtons.YesNo, 
+                MessageBoxIcon.Warning);
+
+            if (result == DialogResult.Yes)
+            {
+                SessionManager.DeleteUser(_editingUsername);
+            }
+        }
+
+        private void btnSaveUser_Click(object sender, EventArgs e)
+        {
+            string username = txtUsername.Text.Trim();
+            string fullName = txtFullName.Text.Trim();
+            string password = txtPassword.Text;
+
+            if (string.IsNullOrEmpty(username))
+            {
+                MessageBox.Show("Username cannot be empty.", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                txtUsername.Focus();
+                return;
+            }
+
+            if (string.IsNullOrEmpty(fullName))
+            {
+                MessageBox.Show("Full Name cannot be empty.", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                txtFullName.Focus();
+                return;
+            }
+
+            if (string.IsNullOrEmpty(password))
+            {
+                MessageBox.Show("Password cannot be empty.", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                txtPassword.Focus();
+                return;
+            }
+
+            // Check duplicate username
+            bool isNewUser = _editingUsername == null;
+            bool usernameExists = SessionManager.Users.Any(u => u.Username.Equals(username, StringComparison.OrdinalIgnoreCase));
+
+            // Determine final password hash to save
+            string finalPasswordHash;
+            if (isNewUser)
+            {
+                if (usernameExists)
+                {
+                    MessageBox.Show($"A user with username '{username}' already exists.", "Duplicate Username", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                    txtUsername.Focus();
+                    return;
+                }
+
+                if (password == "●●●●●●●●")
+                {
+                    MessageBox.Show("Please enter a valid password for the new user.", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                    txtPassword.Focus();
+                    return;
+                }
+
+                finalPasswordHash = PasswordHasher.HashPassword(password);
+
+                var newUser = new User
+                {
+                    Username = username,
+                    FullName = fullName,
+                    Password = finalPasswordHash,
+                    Permissions = GetCheckedPermissions()
+                };
+
+                SessionManager.AddUser(newUser);
+                MessageBox.Show($"User '{username}' created successfully.", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
+                
+                // Select the newly created user
+                lstUsers.SelectedItem = username;
+            }
+            else
+            {
+                // Editing existing user
+                if (!username.Equals(_editingUsername, StringComparison.OrdinalIgnoreCase) && usernameExists)
+                {
+                    MessageBox.Show($"A user with username '{username}' already exists.", "Duplicate Username", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                    txtUsername.Focus();
+                    return;
+                }
+
+                var existingUser = SessionManager.Users.FirstOrDefault(u => u.Username.Equals(_editingUsername, StringComparison.OrdinalIgnoreCase));
+                if (password == "●●●●●●●●" || string.IsNullOrEmpty(password))
+                {
+                    // Keep existing hashed password
+                    finalPasswordHash = existingUser != null ? existingUser.Password : PasswordHasher.HashPassword("admin");
+                }
+                else
+                {
+                    // Hash new password
+                    finalPasswordHash = PasswordHasher.HashPassword(password);
+                }
+
+                var updatedUser = new User
+                {
+                    Username = username,
+                    FullName = fullName,
+                    Password = finalPasswordHash,
+                    Permissions = GetCheckedPermissions()
+                };
+
+                string originalName = _editingUsername!;
+                SessionManager.UpdateUser(originalName, updatedUser);
+                MessageBox.Show($"User details for '{username}' updated successfully.", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
+                
+                // Keep the selection updated
+                lstUsers.SelectedItem = username;
+            }
+        }
+
+        private void btnTogglePassword_Click(object sender, EventArgs e)
+        {
+            if (txtPassword.PasswordChar == '•')
+            {
+                txtPassword.PasswordChar = '\0'; // Show password
+                btnTogglePassword.Text = "🙈";
+            }
+            else
+            {
+                txtPassword.PasswordChar = '•'; // Mask password
+                btnTogglePassword.Text = "👁";
+            }
+        }
+
+        private List<string> GetCheckedPermissions()
+        {
+            var list = new List<string>();
+            for (int i = 0; i < chkPermissions.Items.Count; i++)
+            {
+                if (chkPermissions.GetItemChecked(i))
+                {
+                    string? permissionName = chkPermissions.Items[i].ToString();
+                    if (permissionName != null)
+                    {
+                        list.Add(permissionName);
+                    }
+                }
+            }
+            return list;
+        }
+
+        private void btnAddNewPermission_Click(object sender, EventArgs e)
+        {
+            string newPerm = txtNewPermission.Text.Trim();
+            if (string.IsNullOrEmpty(newPerm))
+            {
+                MessageBox.Show("Please enter a permission name.", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                txtNewPermission.Focus();
+                return;
+            }
+
+            if (SessionManager.AvailablePermissions.Contains(newPerm, StringComparer.OrdinalIgnoreCase))
+            {
+                MessageBox.Show($"Permission '{newPerm}' already exists in the system.", "Duplicate Permission", MessageBoxButtons.OK, MessageBoxIcon.Warning);
+                txtNewPermission.Focus();
+                return;
+            }
+
+            SessionManager.AddPermission(newPerm);
+            txtNewPermission.Clear();
+            RefreshPermissionList();
+            
+            MessageBox.Show($"New permission '{newPerm}' registered. You can now assign it to users.", "Permission Registered", MessageBoxButtons.OK, MessageBoxIcon.Information);
+        }
+
+        protected override void OnFormClosing(FormClosingEventArgs e)
+        {
+            // Unsubscribe to prevent memory leaks
+            SessionManager.UsersUpdated -= SessionManager_UsersUpdated;
+            base.OnFormClosing(e);
+        }
+    }
+}

UserPermissionTesting_CS_WinForms/App.config

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8" ?>
-<configuration>
-    <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8.1" />
-    </startup>
-</configuration>

UserPermissionTesting_CS_WinForms/Form1.Designer.cs

@@ -1,40 +0,0 @@
-namespace UserPermissionTesting_CS_WinForms
-{
-    partial class Form1
-    {
-        /// <summary>
-        /// Required designer variable.
-        /// </summary>
-        private System.ComponentModel.IContainer components = null;
-
-        /// <summary>
-        /// Clean up any resources being used.
-        /// </summary>
-        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
-        protected override void Dispose(bool disposing)
-        {
-            if (disposing && (components != null))
-            {
-                components.Dispose();
-            }
-            base.Dispose(disposing);
-        }
-
-        #region Windows Form Designer generated code
-
-        /// <summary>
-        /// Required method for Designer support - do not modify
-        /// the contents of this method with the code editor.
-        /// </summary>
-        private void InitializeComponent()
-        {
-            this.components = new System.ComponentModel.Container();
-            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-            this.ClientSize = new System.Drawing.Size(800, 450);
-            this.Text = "Form1";
-        }
-
-        #endregion
-    }
-}
-

UserPermissionTesting_CS_WinForms/Form1.cs

@@ -1,20 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Data;
-using System.Drawing;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows.Forms;
-
-namespace UserPermissionTesting_CS_WinForms
-{
-    public partial class Form1 : Form
-    {
-        public Form1()
-        {
-            InitializeComponent();
-        }
-    }
-}

UserPermissionTesting_CS_WinForms/Program.cs

@@ -1,22 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using System.Windows.Forms;
-
-namespace UserPermissionTesting_CS_WinForms
-{
-    internal static class Program
-    {
-        /// <summary>
-        /// The main entry point for the application.
-        /// </summary>
-        [STAThread]
-        static void Main()
-        {
-            Application.EnableVisualStyles();
-            Application.SetCompatibleTextRenderingDefault(false);
-            Application.Run(new Form1());
-        }
-    }
-}

UserPermissionTesting_CS_WinForms/Properties/AssemblyInfo.cs

@@ -1,33 +0,0 @@
-using System.Reflection;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-
-// General Information about an assembly is controlled through the following
-// set of attributes. Change these attribute values to modify the information
-// associated with an assembly.
-[assembly: AssemblyTitle("UserPermissionTesting_CS_WinForms")]
-[assembly: AssemblyDescription("")]
-[assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("")]
-[assembly: AssemblyProduct("UserPermissionTesting_CS_WinForms")]
-[assembly: AssemblyCopyright("Copyright ©  2026")]
-[assembly: AssemblyTrademark("")]
-[assembly: AssemblyCulture("")]
-
-// Setting ComVisible to false makes the types in this assembly not visible
-// to COM components.  If you need to access a type in this assembly from
-// COM, set the ComVisible attribute to true on that type.
-[assembly: ComVisible(false)]
-
-// The following GUID is for the ID of the typelib if this project is exposed to COM
-[assembly: Guid("64cf267a-0840-43c4-a915-2fe9d9874530")]
-
-// Version information for an assembly consists of the following four values:
-//
-//      Major Version
-//      Minor Version
-//      Build Number
-//      Revision
-//
-[assembly: AssemblyVersion("1.0.0.0")]
-[assembly: AssemblyFileVersion("1.0.0.0")]

UserPermissionTesting_CS_WinForms/Properties/Resources.Designer.cs

@@ -1,71 +0,0 @@
-//------------------------------------------------------------------------------
-// <auto-generated>
-//     This code was generated by a tool.
-//     Runtime Version:4.0.30319.42000
-//
-//     Changes to this file may cause incorrect behavior and will be lost if
-//     the code is regenerated.
-// </auto-generated>
-//------------------------------------------------------------------------------
-
-namespace UserPermissionTesting_CS_WinForms.Properties
-{
-
-
-    /// <summary>
-    ///   A strongly-typed resource class, for looking up localized strings, etc.
-    /// </summary>
-    // This class was auto-generated by the StronglyTypedResourceBuilder
-    // class via a tool like ResGen or Visual Studio.
-    // To add or remove a member, edit your .ResX file then rerun ResGen
-    // with the /str option, or rebuild your VS project.
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
-    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
-    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    internal class Resources
-    {
-
-        private static global::System.Resources.ResourceManager resourceMan;
-
-        private static global::System.Globalization.CultureInfo resourceCulture;
-
-        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
-        internal Resources()
-        {
-        }
-
-        /// <summary>
-        ///   Returns the cached ResourceManager instance used by this class.
-        /// </summary>
-        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
-        internal static global::System.Resources.ResourceManager ResourceManager
-        {
-            get
-            {
-                if ((resourceMan == null))
-                {
-                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("UserPermissionTesting_CS_WinForms.Properties.Resources", typeof(Resources).Assembly);
-                    resourceMan = temp;
-                }
-                return resourceMan;
-            }
-        }
-
-        /// <summary>
-        ///   Overrides the current thread's CurrentUICulture property for all
-        ///   resource lookups using this strongly typed resource class.
-        /// </summary>
-        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
-        internal static global::System.Globalization.CultureInfo Culture
-        {
-            get
-            {
-                return resourceCulture;
-            }
-            set
-            {
-                resourceCulture = value;
-            }
-        }
-    }
-}

UserPermissionTesting_CS_WinForms/Properties/Resources.resx

@@ -1,117 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<root>
-  <!-- 
-    Microsoft ResX Schema 
-    
-    Version 2.0
-    
-    The primary goals of this format is to allow a simple XML format 
-    that is mostly human readable. The generation and parsing of the 
-    various data types are done through the TypeConverter classes 
-    associated with the data types.
-    
-    Example:
-    
-    ... ado.net/XML headers & schema ...
-    <resheader name="resmimetype">text/microsoft-resx</resheader>
-    <resheader name="version">2.0</resheader>
-    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
-    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
-    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
-    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
-    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
-        <value>[base64 mime encoded serialized .NET Framework object]</value>
-    </data>
-    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
-        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
-        <comment>This is a comment</comment>
-    </data>
-                
-    There are any number of "resheader" rows that contain simple 
-    name/value pairs.
-    
-    Each data row contains a name, and value. The row also contains a 
-    type or mimetype. Type corresponds to a .NET class that support 
-    text/value conversion through the TypeConverter architecture. 
-    Classes that don't support this are serialized and stored with the 
-    mimetype set.
-    
-    The mimetype is used for serialized objects, and tells the 
-    ResXResourceReader how to depersist the object. This is currently not 
-    extensible. For a given mimetype the value must be set accordingly:
-    
-    Note - application/x-microsoft.net.object.binary.base64 is the format 
-    that the ResXResourceWriter will generate, however the reader can 
-    read any of the formats listed below.
-    
-    mimetype: application/x-microsoft.net.object.binary.base64
-    value   : The object must be serialized with 
-            : System.Serialization.Formatters.Binary.BinaryFormatter
-            : and then encoded with base64 encoding.
-    
-    mimetype: application/x-microsoft.net.object.soap.base64
-    value   : The object must be serialized with 
-            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
-            : and then encoded with base64 encoding.
-
-    mimetype: application/x-microsoft.net.object.bytearray.base64
-    value   : The object must be serialized into a byte array 
-            : using a System.ComponentModel.TypeConverter
-            : and then encoded with base64 encoding.
-    -->
-  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
-    <xsd:element name="root" msdata:IsDataSet="true">
-      <xsd:complexType>
-        <xsd:choice maxOccurs="unbounded">
-          <xsd:element name="metadata">
-            <xsd:complexType>
-              <xsd:sequence>
-                <xsd:element name="value" type="xsd:string" minOccurs="0" />
-              </xsd:sequence>
-              <xsd:attribute name="name" type="xsd:string" />
-              <xsd:attribute name="type" type="xsd:string" />
-              <xsd:attribute name="mimetype" type="xsd:string" />
-            </xsd:complexType>
-          </xsd:element>
-          <xsd:element name="assembly">
-            <xsd:complexType>
-              <xsd:attribute name="alias" type="xsd:string" />
-              <xsd:attribute name="name" type="xsd:string" />
-            </xsd:complexType>
-          </xsd:element>
-          <xsd:element name="data">
-            <xsd:complexType>
-              <xsd:sequence>
-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
-                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
-              </xsd:sequence>
-              <xsd:attribute name="name" type="xsd:string" msdata:Ordinal="1" />
-              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
-              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
-            </xsd:complexType>
-          </xsd:element>
-          <xsd:element name="resheader">
-            <xsd:complexType>
-              <xsd:sequence>
-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
-              </xsd:sequence>
-              <xsd:attribute name="name" type="xsd:string" use="required" />
-            </xsd:complexType>
-          </xsd:element>
-        </xsd:choice>
-      </xsd:complexType>
-    </xsd:element>
-  </xsd:schema>
-  <resheader name="resmimetype">
-    <value>text/microsoft-resx</value>
-  </resheader>
-  <resheader name="version">
-    <value>2.0</value>
-  </resheader>
-  <resheader name="reader">
-    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
-  </resheader>
-  <resheader name="writer">
-    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
-  </resheader>
-</root>

UserPermissionTesting_CS_WinForms/Properties/Settings.Designer.cs

@@ -1,30 +0,0 @@
-//------------------------------------------------------------------------------
-// <auto-generated>
-//     This code was generated by a tool.
-//     Runtime Version:4.0.30319.42000
-//
-//     Changes to this file may cause incorrect behavior and will be lost if
-//     the code is regenerated.
-// </auto-generated>
-//------------------------------------------------------------------------------
-
-namespace UserPermissionTesting_CS_WinForms.Properties
-{
-
-
-    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "11.0.0.0")]
-    internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase
-    {
-
-        private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
-
-        public static Settings Default
-        {
-            get
-            {
-                return defaultInstance;
-            }
-        }
-    }
-}

UserPermissionTesting_CS_WinForms/Properties/Settings.settings

@@ -1,7 +0,0 @@
-<?xml version='1.0' encoding='utf-8'?>
-<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)">
-  <Profiles>
-    <Profile Name="(Default)" />
-  </Profiles>
-  <Settings />
-</SettingsFile>

UserPermissionTesting_CS_WinForms/UserPermissionTesting_CS_WinForms.csproj

@@ -1,80 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
-  <PropertyGroup>
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProjectGuid>{64CF267A-0840-43C4-A915-2FE9D9874530}</ProjectGuid>
-    <OutputType>WinExe</OutputType>
-    <RootNamespace>UserPermissionTesting_CS_WinForms</RootNamespace>
-    <AssemblyName>UserPermissionTesting_CS_WinForms</AssemblyName>
-    <TargetFrameworkVersion>v4.8.1</TargetFrameworkVersion>
-    <FileAlignment>512</FileAlignment>
-    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
-    <Deterministic>true</Deterministic>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-    <PlatformTarget>AnyCPU</PlatformTarget>
-    <DebugSymbols>true</DebugSymbols>
-    <DebugType>full</DebugType>
-    <Optimize>false</Optimize>
-    <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-    <PlatformTarget>AnyCPU</PlatformTarget>
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-  </PropertyGroup>
-  <ItemGroup>
-    <Reference Include="System" />
-    <Reference Include="System.Core" />
-    <Reference Include="System.Xml.Linq" />
-    <Reference Include="System.Data.DataSetExtensions" />
-    <Reference Include="Microsoft.CSharp" />
-    <Reference Include="System.Data" />
-    <Reference Include="System.Deployment" />
-    <Reference Include="System.Drawing" />
-    <Reference Include="System.Net.Http" />
-    <Reference Include="System.Windows.Forms" />
-    <Reference Include="System.Xml" />
-  </ItemGroup>
-  <ItemGroup>
-    <Compile Include="Form1.cs">
-      <SubType>Form</SubType>
-    </Compile>
-    <Compile Include="Form1.Designer.cs">
-      <DependentUpon>Form1.cs</DependentUpon>
-    </Compile>
-    <Compile Include="Program.cs" />
-    <Compile Include="Properties\AssemblyInfo.cs" />
-    <EmbeddedResource Include="Properties\Resources.resx">
-      <Generator>ResXFileCodeGenerator</Generator>
-      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
-      <SubType>Designer</SubType>
-    </EmbeddedResource>
-    <Compile Include="Properties\Resources.Designer.cs">
-      <AutoGen>True</AutoGen>
-      <DependentUpon>Resources.resx</DependentUpon>
-    </Compile>
-    <None Include="Properties\Settings.settings">
-      <Generator>SettingsSingleFileGenerator</Generator>
-      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
-    </None>
-    <Compile Include="Properties\Settings.Designer.cs">
-      <AutoGen>True</AutoGen>
-      <DependentUpon>Settings.settings</DependentUpon>
-      <DesignTimeSharedInput>True</DesignTimeSharedInput>
-    </Compile>
-  </ItemGroup>
-  <ItemGroup>
-    <None Include="App.config" />
-  </ItemGroup>
-  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-</Project>

winforms_security_sandbox.md

@@ -0,0 +1,320 @@
+# 📄 .NET 4.8.1 WinForms Authentication & Security Sandbox Manual
+
+Welcome to the technical documentation of the C# WinForms Authentication & Security Sandbox. This manual is organized into two complete sections: **Section 1 in English** and **Bölüm 2 in Turkish**.
+
+---
+
+# SECTION 1: English (Technical Manual)
+
+A premium, modern desktop authentication and user management sandbox designed for C# WinForms targeting **.NET Framework 4.8.1**.
+
+## 🏗 Architecture & Design
+
+The application utilizes a clean Separation of Concerns (SoC) model with shared service layers and event-driven updates.
+
+```mermaid
+graph TD
+    classDef main fill:#1E293B,stroke:#0EA5E9,stroke-width:2px,color:#fff;
+    classDef service fill:#0F172A,stroke:#6366F1,stroke-width:2px,color:#fff;
+    classDef model fill:#1E293B,stroke:#10B981,stroke-width:2px,color:#fff;
+
+    MainForm[MainForm<br/>Dashboard]:::main
+    LoginDialog[LoginDialog<br/>Sign In]:::main
+    UserSettings[UserSettings<br/>Directory Manager]:::main
+    
+    SessionManager[SessionManager<br/>State & Events]:::service
+    User[User Model]:::model
+
+    MainForm -->|Subscribes to Events| SessionManager
+    MainForm -->|Opens dialog| LoginDialog
+    MainForm -->|Opens dialog| UserSettings
+
+    LoginDialog -->|Authenticates| SessionManager
+    UserSettings -->|Modifies directories| SessionManager
+    
+    SessionManager -->|Manages| User
+```
+
+---
+
+## 📂 Project Directory Structure
+
+Here are the key files created for this project in [UserPermissionTest_CS_WinForms](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms):
+
+* 📄 **[UserPermissionTest_CS_WinForms.csproj](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/UserPermissionTest_CS_WinForms.csproj)**: SDK-style project file configured for `net481` with Windows Forms enabled and `Newtonsoft.Json` package installed.
+* 📄 **[Program.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/Program.cs)**: Main execution entry point.
+* 📄 **[User.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/User.cs)**: Object model for users holding Username, Full Name, Password (hashed), and Permissions list.
+* 📄 **[SessionManager.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/SessionManager.cs)**: Dynamic state and session service utilizing cross-form event notifications (`SessionStateChanged`, `UsersUpdated`).
+* 📄 **[PasswordHasher.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/PasswordHasher.cs)**: Cryptographic utility providing one-way SHA-256 password hashing and validation.
+* 🖥 **MainForm**:
+  * [MainForm.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/MainForm.cs): Event listener updates for active sessions.
+  * [MainForm.Designer.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/MainForm.Designer.cs): Beautiful dashboard designer controls.
+* 🖥 **LoginDialog**:
+  * [LoginDialog.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/LoginDialog.cs): Modal sign-in form verification logic with password visibility toggle.
+  * [LoginDialog.Designer.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/LoginDialog.Designer.cs): Compact slate-themed form controls.
+* 🖥 **UserSettings**:
+  * [UserSettings.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/UserSettings.cs): Directory editor, user details modifier, and dynamic system permissions register. Supports secure password placeholders and toggles.
+  * [UserSettings.Designer.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/UserSettings.Designer.cs): Side-by-side catalog and profile fields.
+
+---
+
+## 🗄️ Repository Pattern & PostgreSQL Migration Path
+
+To address future scalability and facilitate a seamless transition to a relational database like **PostgreSQL**, the data layer has been decoupled using the **Repository Pattern**:
+
+```mermaid
+graph LR
+    SessionManager -->|Uses| IUserRepository
+    IUserRepository <|.. JsonUserRepository
+    IUserRepository <|.. PostgreSqlUserRepository
+    
+    style IUserRepository fill:#1E293B,stroke:#F59E0B,stroke-width:2px,color:#fff
+    style JsonUserRepository fill:#1E293B,stroke:#10B981,stroke-width:2px
+    style PostgreSqlUserRepository fill:#1E293B,stroke:#0EA5E9,stroke-width:2px,stroke-dasharray: 5 5
+```
+
+### Decoupled Interfaces:
+* **[IUserRepository.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/IUserRepository.cs)**: Contract layer. Declares `LoadUsers`, `SaveUsers`, `LoadPermissions`, and `SavePermissions`.
+* **[JsonUserRepository.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/JsonUserRepository.cs)**: Local file-based (JSON) storage provider using `Newtonsoft.Json`. Writes/reads database parameters to local files `users.json` / `permissions.json` inside output build directories.
+
+### 🐘 PostgreSQL Migration Steps:
+When you decide to migrate to PostgreSQL, you **only** need to follow these simple steps:
+1. Install `Npgsql` (PostgreSQL Client) and a mapper like `EntityFramework` or `Dapper` via NuGet.
+2. Implement a new class adhering to `IUserRepository`:
+   ```csharp
+   public class PostgreSqlUserRepository : IUserRepository
+   {
+       private readonly string _connectionString;
+       public PostgreSqlUserRepository(string connString) => _connectionString = connString;
+       
+       public List<User> LoadUsers() { /* DB query */ }
+       public void SaveUsers(List<User> users) { /* DB save */ }
+       public List<string> LoadPermissions() { /* DB query */ }
+       public void SavePermissions(List<string> permissions) { /* DB save */ }
+   }
+   ```
+3. Swap a single line in **[SessionManager.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/SessionManager.cs)**:
+   ```csharp
+   // Old: private static readonly IUserRepository UserRepository = new JsonUserRepository();
+   // New:
+   private static readonly IUserRepository UserRepository = new PostgreSqlUserRepository("Host=localhost;Database=mydb;Username=postgres;Password=pwd");
+   ```
+4. **Zero UI Code Modification**: None of the Windows Forms (`MainForm`, `LoginDialog`, `UserSettings`) will require any edits. The application will immediately pull from and write to PostgreSQL.
+
+---
+
+## 🔒 Role-Based Access Control (RBAC)
+
+The application enforces fine-grained authorization constraints on dashboard actions based on active session permissions:
+
+* **Locked State (Not Logged In)**:
+  * The `Manage Users` button is completely disabled and marked as `🔒 Manage Users`.
+* **Unauthorized State (Logged In without privilege)**:
+  * If a user logs in (e.g., `user`) but does not have the **`Manage Users`** or **`Full Control`** permission:
+    * The directory button is locked and updated to `🔒 Manage Users (Locked)`.
+    * Client-side defensive checks verify permissions upon any attempt to click the control, displaying a security alert if breached.
+* **Authorized State (Logged In with privilege)**:
+  * If a user logs in (e.g., `admin`) and has the **`Manage Users`** or **`Full Control`** permission:
+    * The directory button becomes fully active and updates to `👥 Manage Users`.
+
+---
+
+## 🔐 Cryptographic Security & Password UX
+
+The application implements enterprise-level password security and high-fidelity visibility controls:
+
+* **SHA-256 One-Way Hashing**:
+  * Passwords are never stored or processed in plain text. **[PasswordHasher.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/PasswordHasher.cs)** computes a secure SHA-256 hash using `System.Security.Cryptography` for database-compatible security.
+* **On-the-Fly Hashing Migration**:
+  * The file parser in **`JsonUserRepository`** dynamically intercepts old plain-text database profiles on startup. If a legacy plain-text password is encountered, it hashes it instantly and saves the migrated database back to disk transparently.
+* **Secure Administrator Directory Workflows**:
+  * When loading user profiles in `UserSettings`, the password is never sent to the UI. Instead, a protective bullet mask `●●●●●●●●` is shown.
+  * If the administrator edits other details but leaves the password field containing the mask `●●●●●●●●`, the system detects this and keeps the current hashed password completely intact.
+  * If the administrator writes a new string, it hashes and overrides it.
+* **Interactive Password Toggles (Show/Hide)**:
+  * An elegant, borderless eye button (`btnTogglePassword` with `👁`/`🙈` states) is added adjacent to password boxes in `LoginDialog` and `UserSettings` to dynamically toggle characters between masked bullets `'•'` and plain text.
+
+---
+
+## 🎨 Visual Design Choices
+
+* **Harmonious Palettes**: 
+  * Header Panels: Slate Navy (`#1E293B`)
+  * Buttons: Indigo Purple (`#6366F1`) and Emerald Green (`#10B981`)
+  * Backgrounds: White (`#FFFFFF`) with contrasting light slate fills (`#F8FAFC`, `#F1F5F9`)
+* **Typography**: Clean `Segoe UI` fonts utilizing structured bold/semi-bold weight hierarchy for high legibility.
+* **Badges & Lists**: Green/Red status badge for signed-in sessions and bulleted checklists displaying privileges.
+
+---
+
+## 🧪 Pre-Configured Test Credentials
+
+For quick testing, the sandbox initializes with the following default users:
+
+1. **Administrator User**
+   * **Username**: `admin`
+   * **Password**: `admin`
+   * **Permissions**: `View Dashboard`, `Edit Settings`, `Manage Users`, `Full Control`
+
+2. **Standard User**
+   * **Username**: `user`
+   * **Password**: `user`
+   * **Permissions**: `View Dashboard`
+
+---
+---
+
+# BÖLÜM 2: Türkçe (Teknik Kılavuz)
+
+C# WinForms ortamında geliştirilen ve **.NET Framework 4.8.1** sürümünü hedefleyen modern, yüksek güvenlikli kullanıcı oturum ve yetki yönetim laboratuvarı belgesidir.
+
+## 🏗 Mimari Tasarım ve Akış
+
+Uygulama, veri katmanını kullanıcı arayüzünden tamamen ayıran temiz bir Sorumlulukların Ayrılması (SoC) mimarisi ve olay güdümlü (event-driven) güncelleme akışları kullanır.
+
+```mermaid
+graph TD
+    classDef main fill:#1E293B,stroke:#0EA5E9,stroke-width:2px,color:#fff;
+    classDef service fill:#0F172A,stroke:#6366F1,stroke-width:2px,color:#fff;
+    classDef model fill:#1E293B,stroke:#10B981,stroke-width:2px,color:#fff;
+
+    MainForm[MainForm<br/>Dashboard / Panel]:::main
+    LoginDialog[LoginDialog<br/>Giriş Ekranı]:::main
+    UserSettings[UserSettings<br/>Dizin ve Ayarlar]:::main
+    
+    SessionManager[SessionManager<br/>Durum ve Olaylar]:::service
+    User[User Modeli]:::model
+
+    MainForm -->|Olaylara Abone Olur| SessionManager
+    MainForm -->|Açılır Dialog| LoginDialog
+    MainForm -->|Açılır Dialog| UserSettings
+
+    LoginDialog -->|Kimlik Doğrular| SessionManager
+    UserSettings -->|Dizini Düzenler| SessionManager
+    
+    SessionManager -->|Yönetir| User
+```
+
+---
+
+## 📂 Proje Dizin Yapısı
+
+[UserPermissionTest_CS_WinForms](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms) dizininde oluşturulan temel bileşenler şunlardır:
+
+* 📄 **[UserPermissionTest_CS_WinForms.csproj](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/UserPermissionTest_CS_WinForms.csproj)**: `net481` hedefleyen, Windows Forms etkinleştirilmiş ve `Newtonsoft.Json` bağımlılığı yüklenmiş SDK stili modern proje dosyası.
+* 📄 **[Program.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/Program.cs)**: Uygulamanın ana giriş noktası.
+* 📄 **[User.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/User.cs)**: Kullanıcı adı, Ad Soyad, Parola (Hash formatında) ve İzin listesini barındıran veri sınıfı.
+* 📄 **[SessionManager.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/SessionManager.cs)**: Formlar arasında gerçek zamanlı olay bildirimleri (`SessionStateChanged`, `UsersUpdated`) sunan merkezi statik oturum yöneticisi.
+* 📄 **[PasswordHasher.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/PasswordHasher.cs)**: SHA-256 tek yönlü parola kriptolama ve doğrulama yardımcı sınıfı.
+* 🖥 **MainForm**:
+  * [MainForm.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/MainForm.cs): Aktif oturum ve yetki durumu değişikliklerini dinleyen ana panel kodları.
+  * [MainForm.Designer.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/MainForm.Designer.cs): Tasarım arayüzü ve yerleşim bileşenleri.
+* 🖥 **LoginDialog**:
+  * [LoginDialog.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/LoginDialog.cs): Şifre gizleme/gösterme özellikli modern kullanıcı giriş doğrulama mantığı.
+  * [LoginDialog.Designer.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/LoginDialog.Designer.cs): Slate temalı giriş formu tasarım detayları.
+* 🖥 **UserSettings**:
+  * [UserSettings.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/UserSettings.cs): Kullanıcı listeleme, ekleme, silme ve dinamik izin tanımlama kodları. Maskelenmiş yönetici şifre düzenleme korumasını barındırır.
+  * [UserSettings.Designer.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/UserSettings.Designer.cs): Yan yana katalog ve profil giriş alanları.
+
+---
+
+## 🗄️ Depo Tasarım Deseni (Repository Pattern) & PostgreSQL Geçiş Yolu
+
+Gelecekte uygulamanın SQL veritabanına taşınmasını kolaylaştırmak ve ölçeklenebilirlik sağlamak adına veri erişim katmanı tamamen **Repository Deseni** ile soyutlaştırılmıştır:
+
+```mermaid
+graph LR
+    SessionManager -->|Kullanır| IUserRepository
+    IUserRepository <|.. JsonUserRepository
+    IUserRepository <|.. PostgreSqlUserRepository
+    
+    style IUserRepository fill:#1E293B,stroke:#F59E0B,stroke-width:2px,color:#fff
+    style JsonUserRepository fill:#1E293B,stroke:#10B981,stroke-width:2px
+    style PostgreSqlUserRepository fill:#1E293B,stroke:#0EA5E9,stroke-width:2px,stroke-dasharray: 5 5
+```
+
+### Soyut Katmanlar:
+* **[IUserRepository.cs](file:///D:/02_Programming/CSharp/CodingSandbox/IUserRepository.cs)**: Tanım arayüzüdür. `LoadUsers`, `SaveUsers`, `LoadPermissions` ve `SavePermissions` metot imzalarını içerir.
+* **[JsonUserRepository.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/JsonUserRepository.cs)**: Dosya tabanlı (JSON) veri saklayıcıdır. Çıktı dizinindeki `users.json` ve `permissions.json` dosyalarını okur/yazar.
+
+### 🐘 PostgreSQL Geçiş Adımları:
+Veritabanı kurulumunuzu yaptığınızda **yalnızca** şu basit adımları izlemeniz yeterli olacaktır:
+1. `Npgsql` (PostgreSQL Client) ve `EntityFramework` veya `Dapper` kütüphanesini NuGet ile projenize yükleyin.
+2. `IUserRepository` arayüzünü uygulayan yeni bir repository sınıfı yazın:
+   ```csharp
+   public class PostgreSqlUserRepository : IUserRepository
+   {
+       private readonly string _connectionString;
+       public PostgreSqlUserRepository(string connString) => _connectionString = connString;
+       
+       public List<User> LoadUsers() { /* PostgreSQL SELECT sorgusu */ }
+       public void SaveUsers(List<User> users) { /* PostgreSQL Kaydetme */ }
+       public List<string> LoadPermissions() { /* DB yetki listesi sorgusu */ }
+       public void SavePermissions(List<string> permissions) { /* DB yetki kaydı */ }
+   }
+   ```
+3. **[SessionManager.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/SessionManager.cs)** dosyasındaki tek satırı güncelleyin:
+   ```csharp
+   // Eski JSON: private static readonly IUserRepository UserRepository = new JsonUserRepository();
+   // Yeni PostgreSQL:
+   private static readonly IUserRepository UserRepository = new PostgreSqlUserRepository("Host=localhost;Database=mydb;Username=postgres;Password=pwd");
+   ```
+4. **Sıfır Arayüz Değişikliği**: `MainForm`, `LoginDialog` veya `UserSettings` formlarındaki tek bir satır kod dahi değiştirilmez. Uygulama verileri anında PostgreSQL üzerinden okuyup yazacaktır.
+
+---
+
+## 🔒 Rol Tabanlı Yetki Kontrolü (RBAC)
+
+Uygulama, giriş yapan kullanıcının aktif izinlerine göre arayüzdeki işlemleri dinamik olarak kısıtlar:
+
+* **Oturum Yokken (Kilitli Durum)**:
+  * Kullanıcı yönetim butonu devre dışı kalır ve `🔒 Manage Users` metniyle gösterilir.
+* **Oturum Var Ancak İzin Yetersizken (Yetkisiz Durum)**:
+  * Giriş yapan kullanıcının yetkileri arasında `Manage Users` veya `Full Control` **yoksa**:
+    * Buton pasif kalır ve durum bilgisini belli etmek için `🔒 Manage Users (Locked)` olarak güncellenir.
+    * Tıklama olayında arka planda yetki kontrolü tekrarlanır ve yetkisiz erişim teşebbüslerinde güvenlik uyarısı verilir.
+* **Oturum Var ve Yetki Yeterliyken (Yetkili Durum)**:
+  * Kullanıcı yetkili ise buton anında aktifleşir, simgesi ve metni `👥 Manage Users` olarak güncellenir ve tıklanabilir hale gelir.
+
+---
+
+## 🔐 Kriptografik Güvenlik & Parola Deneyimi (UX)
+
+Uygulama üst düzey parola güvenliği standartları ve gelişmiş gizleme/gösterme yetenekleriyle donatılmıştır:
+
+* **SHA-256 Tek Yönlü Kriptolama**:
+  * Şifreler diskte asla düz metin olarak saklanmaz. **[PasswordHasher.cs](file:///D:/02_Programming/CSharp/CodingSandbox/UserPermissionTest_CS_WinForms/PasswordHasher.cs)** sınıfı, `System.Security.Cryptography` kütüphanesini kullanarak parolaları SHA-256 formatında şifreler.
+* **Arka Planda Dinamik Otomatik Göç (Auto Hashing Migration)**:
+  * `JsonUserRepository` dosya okuma aşamasında eski/açık metin parola kayıtları algılarsa, bunları **arka planda otomatik olarak SHA-256 hash formatına dönüştürür** ve diske güvenli şekilde geri yazar.
+* **Güvenli Yönetim Ekranı Parola İşlemleri**:
+  * Kullanıcı detayları yüklendiğinde gerçek şifre hash'i arayüze gönderilmez; yerine `●●●●●●●●` şeklinde güvenli bir maske gösterilir.
+  * Şifre alanını `●●●●●●●●` olarak bıraktığınızda sistem şifrenin değiştirilmediğini algılar ve **mevcut hash'i aynen korur**. Yeni bir şifre yazıldığında ise bunu şifreleyerek kaydeder.
+* **Şifre Göster/Gizle Butonları (Eye Toggles)**:
+  * `LoginDialog` ve `UserSettings` şifre kutularının sağına eklenen modern kenarlıksız göz butonu (`btnTogglePassword` ile `👁`/`🙈` durumları) şifrenin maskelenmesi `'•'` ve düz metin gösterilmesi arasında dinamik geçiş sağlar.
+
+---
+
+## 🎨 Görsel Tasarım Tercihleri
+
+* **Özel Uyumlu Renk Paleti**: 
+  * Üst Bilgi Panelleri: Modern Koyu Lacivert/Siyah (`#1E293B`)
+  * Etkin Butonlar: İndigo Moru (`#6366F1`) ve Zümrüt Yeşili (`#10B981`)
+  * Form Zeminleri: Beyaz (`#FFFFFF`) ve kontrast açık gri/slate dolgular (`#F8FAFC`, `#F1F5F9`)
+* **Tipografi**: Browser varsayılanları yerine temiz, okunaklılığı yüksek yarı kalın/kalın yapılandırılmış `Segoe UI` yazı tipleri kullanılmıştır.
+* **Durum Bildirimleri**: Oturum durumunu gösteren Yeşil/Kırmızı dinamik rozetler ve izin listesinde zengin onay sembolleri (`✓`).
+
+---
+
+## 🧪 Hazır Test Kullanıcı Bilgileri
+
+Hızlı test işlemleri için sistem başlangıçta şu hesapları barındırır:
+
+1. **Yönetici Kullanıcı (Tüm Yetkilere Sahip)**
+   * **Kullanıcı Adı**: `admin`
+   * **Parola**: `admin`
+   * **Yetkileri**: `View Dashboard`, `Edit Settings`, `Manage Users`, `Full Control`
+
+2. **Standart Kullanıcı**
+   * **Kullanıcı Adı**: `user`
+   * **Parola**: `user`
+   * **Yetkileri**: `View Dashboard`