SortedList collection in C#.NET

using System;
using System.Collections;


private void SortedList()
        {
            SortedList SrtdLst = new SortedList();
            SrtdLst.Add(1, "B");
            SrtdLst.Add(3, "W");
            SrtdLst.Add(2, "T");
            SrtdLst.Add(6, "P");
            SrtdLst.Add(7, "Q");
            SrtdLst.Add(5, "K");
            SrtdLst.Add(4, "S");
            foreach (string testString in SrtdLst.Values)
            {
                Response.Write(testString+"<br>");
            }
            bool MatchVal = SrtdLst.ContainsValue("S");
            Response.Write("Sorted List contains value of Z : "+ MatchVal + "<br>");
            bool MatchKey = SrtdLst.ContainsKey(7);
            Response.Write("Sorted List contains Key of 7 : " + MatchKey + "<br>");
        }