The difference of member User in ComponentView and ControllerBase

Question

Inside VS 2022, I press F12 on the object "User" in a class DisplayAdminMenuViewComponent : ViewComponent and I get this

// Summary:
// Gets the System.Security.Principal.IPrincipal for the current user.

Doing the same thing but in a class derived from AdminController : Controller I get this.

// Summary:
// Gets the System.Security.Claims.ClaimsPrincipal for user associated with the
// executing action.

And operation User.IsInRole("Admin") fails for the ViewComponent base class, but works for Controller base class!

Why does the two base classes return a different implementation for object User???

Using Dot.Net Core 6.0

Answer 1

a ViewComponent has both

public System.Security.Principal.IPrincipal User { get; }
public System.Security.Claims.ClaimsPrincipal UserClaimsPrincipal { get; }

and a Controller only has:

public System.Security.Claims.ClaimsPrincipal User { get; }

note: a ClaimsPrincipal is an IPrincipal implementation that included claims, so any ClaimsPrincipal is an IPrincipal. old asp.net 4.5* standardized on ClaimsPrincipal and asp.net core controllers followed this. Razor page simple authentication does not require claims, so it supports both.