Demonstrate using a Dictionary<TKey, TValue> collection class. - CSharp Collection

CSharp examples for Collection:Dictionary

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Description

Demonstrate using a Dictionary<TKey, TValue> collection class.

Demo Code

using System;// w  w  w  . j a va  2 s.  c  om
using System.Collections.Generic;
class Program
{
   static void Main(string[] args)
   {
      Dictionary<string, string> dict = new Dictionary<string, string>();
      dict.Add("C#", "cool");
      dict.Add("C++", "tutorial");
      dict.Add("VB", "wordy language");
      dict.Add("Java", "not C#");
      dict.Add("Fortran", "old");
      dict.Add("Cobol", "older");
      Console.WriteLine("Contains key C# " + dict.ContainsKey("C#"));
      Console.WriteLine("Contains key Ruby " + dict.ContainsKey("Ruby"));
      Console.WriteLine("\nContents of the dictionary:");
      foreach (KeyValuePair<string, string> pair in dict)
      {
         Console.WriteLine("Key: " + pair.Key.PadRight(8) + "Value: " + pair.Value);
      }
      Dictionary<string, string>.KeyCollection keys = dict.Keys;
      foreach(string key in keys)
      {
         Console.WriteLine("Key: " + key);
      }
      Dictionary<string, string>.ValueCollection values = dict.Values;
      foreach (string value in values)
      {
         Console.WriteLine("Value: " + value);
      }
      Console.Write("\nNumber of items in the dictionary: " + dict.Count);
   }
}

Result


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