扩展方法简单实例

using System;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            Class1 class1 = new Class1();
            class1.MethodOfClass1();
            Console.ReadKey();
        }
    }
    class Class1
    {
    }
    static class Class2
    {
        public static void MethodOfClass1(this Class1 class1)
        {
            Console.WriteLine("I'm the method of Class1~");
        }
    }
}

 

OutPut：I'm the method of Class1~