using System;

namespace Program
{
    class Program
    {
        delegate void myDelegateType(int i);

        static void Main(string[] args)
        {
            myDelegateType myDelegate;
            // delegate refers to named methods with the same signature
            myDelegate = subone;
            myDelegate = addone;

            // delegate can refer to anonymous "lambda" expression
            myDelegate += i => Console.WriteLine(i + 17);

            // calls the two named and the lambda
            myDelegate(17);
        }

        static void addone(int i) { Console.WriteLine(i + 1); }
        static void subone(int i) { Console.WriteLine(i - 1); }
    }
}