using System;
using System.Collections.Generic;
 
namespace DictionaryExample
{
  class Program
  {
    static void Main(string[] args)
    {
      // Create a dictionary in which both keys and values are strings.
      Dictionary<string, string> surfDict = new Dictionary<string, string>();
 
      // Add some items to the dictionary: each has a key and a value.
      surfDict.Add ("Mavericks", "Big waves, cold water, and lots of Great White Sharks!");
      surfDict.Add ("Teahupoo", "Heaviest wave in the world, in Tahiti, so it is warm but very shallow.");
      surfDict.Add ("Jaws", "Warm water break that reaches 60 feet high, north shore of Maui, HI");
      surfDict.Add ("Nazare", "Worlds biggest surfed wave, up to 100+ feet, in Portugal");
      surfDict.Add ("Cocoa Beach", "Small, crappy wave in Cocoa Beach FL, home of Kelly Slater and lots of small sharks.");
 
 
      // See if the dictionary contains a particular key.
      Console.WriteLine ("Use the ContainsKey method to see if a surf breaks exists in your surf break Dictionary:");
      Console.WriteLine ("Contains key Mavericks       " + surfDict.ContainsKey ("Mavericks"));
      Console.WriteLine ("Contains key Teahupoo     " + surfDict.ContainsKey ("Teahupoo"));
      Console.WriteLine ("Contains key Nahant Beach " + surfDict.ContainsKey ("Nahant Beach"));
 
      // Iterate the dictionary's contents with foreach.
      // Note that you're iterating pairs of keys and values,
      // using the KeyValuePair<t,u> type.
      Console.WriteLine ("\nContents of the dictionary:");
      foreach (KeyValuePair<string, string> pair in surfDict)
      {
            // Because the key is a string, you can use string methods
            Console.WriteLine ("Key: " + pair.Key.PadRight(8) + " -  Value: " + pair.Value);
      }
 
      // List the keys, remember they are in no particular order.
      Console.WriteLine ("\nJust the keys:");
 
      // Dictionary<TKey, TValue>.KeyCollection is a collection of just the keys,
     // in this case strings. So here's how to retrieve the keys:
      Dictionary<string, string>.KeyCollection keys = surfDict.Keys;
      foreach(string key in keys)
      {
            Console.WriteLine ("Key: " + key);
      }
 
      // List the values, which are in same order as key collection above.
      Console.WriteLine ("\nJust the values:");
      Dictionary<string, string>.ValueCollection values = surfDict.Values;
      foreach (string value in values)
      {
            Console.WriteLine ("Value: " + value);
      }
 
      Console.Write ("\nNumber of items in the dictionary: " + surfDict.Count);
 
    }
  }
}

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