Simple delegate example

class Program
{
public delegate void Say(string s);

public void Hello(string s)
{
Console.WriteLine("Hello " + s);
}

public void Goodbye(string s)
{
Console.WriteLine("Bye bye " + s);
}

static void Main(string[] args)
{
Program obj = new Program();

Say a = new Say(obj.Hello);
Say b = new Say(obj.Goodbye);

a("Johnson");
b("Johnson");
}
}