using System;namespace DelegateDemo{  class Program  {    private delegate int Cacu(string str);    static void Main(string[] args)    {      //1      Cacu cacu = new Cacu(CacuInstance);      Console.WriteLine(cacu("Hello,Wrold"));      //2      Cacu cacu1 = new Cacu(delegate(string str) { return str.Length; });      Console.WriteLine(cacu1("Hello,Wrold"));      //3      Cacu cacu2 = new Cacu((str) => { return str.Length; });      Console.WriteLine(cacu2("Hello,Wrold"));    }    static int CacuInstance(string str)    {      return str.Length;    }  }}