using System;

using System.Xml;

using System.Xml.Serialization;

using System.IO;

using System.Linq;

using System.Collections;

using System.Collections.Generic;

using System.Xml.Linq;

using System.Data;

using System.Collections.Specialized;

using System.Text.RegularExpressions;

using System.Globalization;

using System.Diagnostics;

public class Program

{

    public static void Main()

    {

        List<KeyValuePair<int,int>> list = new List<KeyValuePair<int,int>>() {new KeyValuePair<int,int>(21,2), new KeyValuePair<int,int>(22,1), new KeyValuePair<int,int>(24,2)};

            var keyvalue = list.GroupBy(x => x.Value)

                        .OrderByDescending(x => x.Key)

                        .First()

                        .OrderByDescending(x=>x.Key)

                        .FirstOrDefault();

        keyvalue.Dump();

    }   

}