Can I define 2 delegates with the same name but different parameters?

Question

I tried to define a delegate override between Int32 and IntPtr. Why are the following overloads illegal?

public delegate int EnumWi         


        

Answer 1

No, you cannot overload a delegate. Overloads are selected when there is type information available to the compiler to pick one... but with a delegate, you are supplying the type information and the compiler would have no way to select from overloads.

If you want a family of similar delegate types, you can use generics.

public delegate int EnumWindowsCallback(System.IntPtr hWnd, LParamType lParam);

Now you can define overloaded p/invoke signatures which accept different delegate types EnumWindowsCallback, EnumWindowsCallback, etc.