using System;
 
class IndexerClass 
{
   public int this [int index]   // Indexer declaration
   {
      get 
      {
         Console.WriteLine("GET {0}", index);
         return 0;
      }
      set 
      {
         Console.WriteLine("SET {0} {1}", index, value);
      }
   }
}
 
public class MainClass 
{
   public static void Main() 
   {
      IndexerClass b = new IndexerClass();
 
      int x = b[5];
      x++;
      b[5] = x;
 
      Console.WriteLine("x={0}", x);
   }
}

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