深入Ref,Out的理解及其使用

    class Program  
       {  
           //使用out后必须对变量赋值  
           public void TestOut(out int x, out int y)  
           {  
               x = 1;  
               y = 2;  
           }  
           //此时传进来的值分别为x1:10,y1:11,输出之后的x1的值为2  

           public void TestRef(ref int x, ref int y)  
           {  
               //引用剪剪那句话传进来的是猪,出来的可能是头牛(很精辟！)  
               x = 2;  

           }  
           static void Main(string[] args)  
           {  
               int x;  
               int y;  
               Program P1 = new Program();  
               P1.TestOut(out x,out y);  
               Console.WriteLine("x={0},y={1}", x, y);  
               //在使用之前ref必须对变量赋值  
               int x1 = 10;  
               int Y1 = 11;  
               P1.TestRef(ref x1,ref Y1);  
               Console.WriteLine("x1={0},y1={1}", x1, Y1);  
           }  
       }