Use ref to pass a value type by reference : Parameters Passing « Language Basics « C# / C Sharp

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C# / C Sharp » Language Basics » Parameters PassingScreenshots 
Use ref to pass a value type by reference
Use ref to pass a value type by reference

/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Use ref to pass a value type by reference. 
 
using System; 
 
class RefTest 
  /* This method changes its arguments. 
     Notice the use of ref. */ 
  public void sqr(ref int i) { 
    i = i * i; 
  

 
public class RefDemo 
  public static void Main() { 
    RefTest ob = new RefTest()
 
    int a = 10
 
    Console.WriteLine("a before call: " + a)
 
    ob.sqr(ref a)// notice the use of ref 
 
    Console.WriteLine("a after call: " + a)
  
}

           
       
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