C#Hashtable类

using System;
using System.Collections;

namespace CollectionsApplication {

   class Program {

      static void Main(string[] args) {
         Hashtable ht = new Hashtable();

         ht.Add("001", "Zara Ali");
         ht.Add("002", "Abida Rehman");
         ht.Add("003", "Joe Holzner");
         ht.Add("004", "Mausam Benazir Nur");
         ht.Add("005", "M. Amlan");
         ht.Add("006", "M. Arif");
         ht.Add("007", "Ritesh Saikia");

         if (ht.ContainsValue("Nuha Ali")) {
            Console.WriteLine("This student name is already in the list");
         } else {
            ht.Add("008", "Nuha Ali");
         }

         // Get a collection of the keys.
         ICollection key = ht.Keys;

         foreach (string k in key) {
            Console.WriteLine(k + ": " + ht[k]);
         }
         Console.ReadKey();
      }
   }
}

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