added "UserPermissionTesting_CS_WinForms" project

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);
+        }
+    }
+}