A delegate object encapsulates a reference to a method. In 
C++ they were referred to as function pointers.

The delegate keyword is used to declare a reference type 
that can be used to encapsulate a named or an anonymous 
method. Delegates are similar to function pointers in C++; 
however, delegates are type-safe and secure.

Delegates are like pointer to functions in c and c++
Delegates are used to encapsulate functions into callable 
function object (delegates are type sage in c#)