Cannot assign a delegate of one type to another even though signature matches

Question

My morbid curiosity has me wondering why the following fails:

// declared somewhere
public delegate int BinaryOperation(int a, int b);

// ... in a method bo         


        

Answer 1

Here's a similar question: why doesn't this compile?

// declared somewhere
struct Foo {
    public int x;
    public int y;
}

struct Bar {
    public int x;
    public int y;
}

// ... in a method body
Foo item = new Foo { x = 1, y = 2 };

Bar b1 = item; // doesn't compile, and casting doesn't compile
Bar b2 = new Bar { x = 1, y = 2 }; // compiles!

In this case it seems a little more natural for the cast to not work, but it's really the same reason.