Hashtable

In this chapter you will learn:

How to use for loop to get all keys from a Hashtable

Elements in Hashtable

Hashtable is a data structure we can add key and value pair to it.

The following code uses foreach statement to loop through all keys in a hashtable.

using System;/* j av a2s .  c  om*/
using System.Collections;

class MainClass
{
    public static void Main()
    {
        Hashtable    hash = new Hashtable();
        hash.Add("A", "1");
        hash.Add("B", "2");
        hash.Add("C", "3");
        hash.Add("D", "4");
        hash.Add("E", "5");
        
        foreach (string firstName in hash.Keys)
        {
            Console.WriteLine("{0} {1}", firstName, hash[firstName]);
        }
    }
}