Collections Data Structure C#

using System;
using System.Collections;
using System.Collections.Specialized;
public class OrderedDictionarySample
{
    public static void Main()
    {
        OrderedDictionary myOrderedDictionary = new OrderedDictionary();
        myOrderedDictionary.Add("testKey1", "testValue1");
        myOrderedDictionary.Add("testKey2", "testValue2");
        myOrderedDictionary.Add("keyToDelete", "valueToDelete");
        myOrderedDictionary.Add("testKey3", "testValue3");
        myOrderedDictionary.Add("newKey1", "newValue1");
        myOrderedDictionary.Add("newKey2", "newValue2");
        myOrderedDictionary.Add("newKey3", "newValue3");
        IDictionaryEnumerator myEnumerator =myOrderedDictionary.GetEnumerator();
        DisplayEnumerator(myEnumerator);
    }
    public static void DisplayEnumerator(IDictionaryEnumerator myEnumerator)
    {
        while (myEnumerator.MoveNext())
        {
            Console.WriteLine("   {0,-25} {1}",myEnumerator.Key, myEnumerator.Value);
        }
    }
   
}