using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var listOfHStringsToSplitFor = new System.Collections.Specialized.OrderedDictionary();

        listOfHStringsToSplitFor.Add("a","b");

        listOfHStringsToSplitFor.Add("b","b");

        listOfHStringsToSplitFor.Add("c","b");

        listOfHStringsToSplitFor.Add("d","b");

        listOfHStringsToSplitFor.Add("e","b");

        Console.WriteLine(listOfHStringsToSplitFor.Keys.OfType<ulong>());

    }

}