using System;
publicclassExample
{
   publicstaticvoid Main() //calling method
   {
       int val1 = 0; //must be initialized 
       int val2; //optional
  Example1(ref val1);
       Console.WriteLine("Result of Ref keywordis=>"+val1);// val1=1
  Example2(out val2);
       Console.WriteLine("Result of out keywordis=>"+val2);// val2=2
       Console.ReadKey();
   }
 
   staticvoid Example1(refint value) //called method
   {
       value = 1;
   }
   staticvoid Example2(outint value) //called method
   {
       value = 2; //must be initialized 
   }
}