Generic class with self-referencing type constraint

Question

Consider the following code:

abstract class Foo
    where T : Foo, new()
{
    void Test()
    {
        if(Bar != null)
            Bar(th         


        

Answer 1

You can cast 'this' to T:

Bar((T)this);

This however will fail if you have the following:

public class MyFoo : Foo { }

public class MyOtherFoo : Foo { }

Because 'MyOtherFoo' is not an instance of 'MyFoo'. Take a look at this post by Eric Lippert, one of the designers of C#.