Which of the following will be the correct output for the C

Which of the following will be the correct output for the C#.NET program given below?

namespace LogicConsoleApplication {
   struct Sample {  
     public int i; 
   }   
   class MyProgram  {  
     static void Main(string[] args) { 
       Sample x = new Sample();
       x.i = 10;   
       fun(ref x);
       Console.Write(x.i + " ");
     }  
     public static void fun(ref Sample y) {     
       y.i = 20; 
       Console.Write(y.i + " "); 
     }
   }  
 }