Declaring and Using Delegates
A delegate is a pointer to a method. A delegate looks and behaves much like an ordinary
method when it is called. However, when you call a delegate, the runtime actually
executes the method the delegate refers to. You can dynamically change the method that
a delegate references, so code that calls a delegate might actually run a different method
each time it executes. The best way to understand delegates is to see them in action, so
let's work through an example.
NOTE
If you are familiar with C++, a delegate is very similar to a function pointer. However,
unlike function pointers, delegates are type-safe; you can only make a delegate refer to a
method that matches the signature of the delegate, and you cannot call a delegate that
does not refer to a valid method.