DelegateBasics.cs

using System;

/* Basic Delegate Notes
 * 
 * A delegate is a type safe function pointer. It holds a reference(pointer) to a function
 * 
 * A delegate must have a return type
 * 
 * The signature of the delegate MUST match the signature of the function that the delegate points to
 * 
 * A delegate is similar to a class, you can create an instance of it
 * 
 * When you create an instance of a delegate, you must pass in the function name as a parameter to the delegate constructor
 * 
 * The delegate syntax is similar to a method, but with a delegate keyword
 * 
 */

public delegate void SayHelloDelegate(string Message);

public class Program
{
    public static void Main()
    {
        SayHelloDelegate sayHello = new SayHelloDelegate(SayHello); /*instantiate delegate with reference sayHello, pass the function
                                                                    that is to be used as the parameter */
        
        sayHello("Hello from the SayHelloDelegate"); //the SayHello function can now be invoked using the object reference to the delegate
    }

    public static void SayHello(string stringMessage)
    {
        Console.WriteLine(stringMessage);
    }

}