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; } }}