C# this指针用法

 public class ThisName 
   {
       public string name = "张三";
       public int num = 55;
       public ThisName() { }
       public void GetThisName(string name, int num)
       {
           name = this.name;//调取全局变量name
           num = this.num;//调取全局变量num
           HttpContext.Current.Response.Write("参数name的值为:"+name+";参数num的值为:"+num);//输出结果为"参数name的值为张三;参数num值为:55"
       }
   }

 public  class ThisFF
    {
       public ThisFF()
       { 
       }
       public string shuju()
       {
           return "This指针当做方法传递";
       }

       public void f1(ThisFF ff)
       {
           HttpContext.Current.Response.Write(ff.shuju());
       }

       public void f()
       {
           f1(this);//this在这里可以理解为 ThisFF ff=news ThisFF();当前类的实例
       }
    }

   ThisFF ff=news ThisFF();//方法实例
   ff.f();//调用方法 输出结果为： This指针当做方法传递

 private int _Sy;
        public int this[int sy]
        {
            get { return  _Sy;}
            set { sy=_Sy;}
        }