C#3.0分部份方法

例程：

    class Program
    {
        static void Main(string[] args)
        {
            MyClass mc=new MyClass();
            mc.write();
            Console.Read();
        }

    }



    //分部份方法
    partial class MyClass
    {//方法声明类
        partial void myFirstMothed();

        public void write()
        {
            Console.WriteLine(i);
            myFirstMothed();
            Console.WriteLine(i);
        }
    }

    partial class MyClass
    {//方法实现类
        private int i = 0;
        partial void myFirstMothed()
        {
            i = ++i;
        }
    }

详细请阅读：http://community.bartdesmet.net/blogs/bart/archive/2007/07/28/c-3-0-partial-methods-what-why-and-how.aspx