CodingSandbox/UserPermissionTest_CS_WinForms/IUserRepository.cs

using System.Collections.Generic;

namespace UserPermissionTest_CS_WinForms
{
    public interface IUserRepository
    {
        List<User> LoadUsers();
        void SaveUsers(List<User> users);
        List<Permission> LoadPermissions();
        void SavePermissions(List<Permission> permissions);
    }
}