Question

I’m loading custom user controls into my form using reflection.
I would like all my user controls to have a “Start” and “End” method so they should all be like:

public interface IStartEnd
{
    void Start();
    void End();
}

public class AnotherControl : UserControl, IStartEnd
{            
    public void Start()
    { }

    public void End()
    { }
}

I would like an interface to load through reflection, but the following obviously wont work as an interface cannot inherit a class:

public interface IMyUserControls : UserControl, IInit, IDispose
{

}

Answer 1

You can enforce the constraint at runtime that the class implementing IMyUserControls : IInit, IDispose also is UserControl. It’s reasonable to assume that the developers providing custom controls for your app know the requirements for the controls, so I don’t see a problem with performing the check at runtime.