using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        SortedList<int,string> srt = new SortedList<int,string>();

        srt.Add(1,"One");

        srt.Add(5,"Two");

        srt.Add(3,"Three");

        srt.Add(2,"Four");

        srt.Add(4,"Five");

    var query = from kvp in srt

                where kvp.Key == 5

                select kvp;

    var result = query.FirstOrDefault();

    Console.WriteLine("Key: {0}, Value: {1}", result.Key,result.Value);

    var result1 = srt.Where(kvp1=>kvp1.Key == 2).FirstOrDefault();

    Console.WriteLine("Key: {0}, Value: {1}", result1.Key,result1.Value);

    }

}