using System;
  using System.Collections.Generic;
  
  public class Example
  {
      public static void Main()
      {
          // Create a new dictionary of strings, with string keys and
  
          // an initial capacity of 4.
  
          Dictionary<string, string> openWith = 
                                 new Dictionary<string, string>(4);
  
          // Add 4 elements to the dictionary. 
  
          openWith.Add("txt", "notepad.exe");
          openWith.Add("bmp", "paint.exe");
          openWith.Add("dib", "paint.exe");
          openWith.Add("rtf", "wordpad.exe");
          openWith.Add("raw", "wordpad.exe");
  
  
          // List the contents of the dictionary.
  
          Console.WriteLine();
          foreach( KeyValuePair<string, string> kvp in openWith )
          {
              Console.WriteLine("Key = {0}, Value = {1}", 
                 kvp.Key, kvp.Value);
          }
      }
  }
  
  /* This code example produces the following output:

Key = txt, Value = notepad.exe
Key = bmp, Value = paint.exe
Key = dib, Value = paint.exe
Key = rtf, Value = wordpad.exe
 */