SamplesHashtable

 using System;
 using System.Collections;

 public class SamplesHashtable
 {
     public static void Main()
     {
         Hashtable myHT = new Hashtable();

         myHT.Add("Ton V. Bergyk", "023-010-66756");
         myHT.Add("Tom Sony", "086-010-27654");
         myHT.Add("Mr. John", "071-222-33445");

         myHT["Mr. John"] = "071-222-33445"; //加入或修改

         PrintKeysAndValues( myHT );
         PrintByKeys( myHT );
     }

     public static void PrintKeysAndValues( Hashtable myList )
     {
         IDictionaryEnumerator myEnumerator = myList.GetEnumerator();
         while ( myEnumerator.MoveNext() )
             Console.WriteLine("\t{0}:\t{1}",
                 myEnumerator.Key, myEnumerator.Value);
         Console.WriteLine();
     }

     public static void PrintByKeys( Hashtable myList )
     {
         IEnumerator ie = myList.Keys.GetEnumerator();
         while( ie.MoveNext() )
         {
             object key = ie.Current;
             object value = myList[ key ];

             Console.WriteLine("\t{0}:\t{1}", key, value );
         }
         Console.WriteLine();

         foreach( string key in myList.Keys )
         {
             Console.WriteLine("\t{0}:\t{1}", key, myList[key] );
         }
     }
 }