Question

How can I declare my Basepage class in an asp.net webforms project to also implement IBasePage?

public abstract class BasePage<T> : Page where T : class
{

}

and the interface

public interface IBasePage
    {
        UserProfile UserProfile { get;}
        bool IsStreamingAdmin {get;}
        int? EmplId {get;}       
    }

my ultimate goal is to be able to write code this like:

IBasePage page = HttpContext.Current.Handler as IBasePage;
if (page.IsStreamingAdmin)
{
    //do something here....
}

Answer 1

Your question isn’t totally clear to me, but couldn’t you just do:

public abstract class BasePage<T> : Page, IBasePage where T : class { }