What steps are necessary to implement an authorization system in your application?

To implement an authorization system in a C# application, you need to:

1. Define authorization requirements (roles, access rights).
2. Choose an appropriate mechanism (e.g., ASP.NET Identity, JWT, OAuth).
3. Configure user and data storage (database, external services).
4. Implement user registration and login with credential verification.
5. Set up route and resource protection requiring authorization.
6. Ensure session or token management.

Example using ASP.NET Core Identity:

services.AddIdentity<ApplicationUser, IdentityRole>()
    .AddEntityFrameworkStores<ApplicationDbContext>()
    .AddDefaultTokenProviders();

// In the controller
[Authorize]
public IActionResult SecurePage() {
    return View();
}