Why are all Delegate types incompatible with each other?

Question

In C# all delegate types are incompatible with one another, even if they have the same signature. As an example:

delegate void D1();
delegate void D2();

D1 d1          


        

Answer 1

Delegate is nothing but just another type. They are incompatible for the same reason class A {} and class B {} would be incompatible.

delegate void D1();

Will approximately compile to something like:

class D1 : MulticastDelegate { .... }