Use ref to pass a value type by reference : Parameter Reference « Language Basics « C# / CSharp Tutorial

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C# / CSharp Tutorial » Language Basics » Parameter Reference 
1. 13. 3. Use ref to pass a value type by reference
 
 
using System; 
 
class RefTest 
  /* This method changes its argument. 
     Notice the use of ref. */ 
  public void sqr(ref int i) { 
    i = i * i; 
  

 
class MainClass 
  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)
  
}

        
a before call: 10
a after call: 100
  
1. 13. Parameter Reference
1. 13. 1. Pass references to methods
1. 13. 2. Objects are passed by reference.
1. 13. 3. Use ref to pass a value type by reference
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