using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    struct Version

    {

        public int Major;

        public int Minor;

    }

​

    public static void Main()

    {

        var amounts = new List<Version>{

            new Version{Major = 1, Minor = 31},

            new Version{Major = 2, Minor = 38},

            new Version{Major = 1, Minor = 32},

            new Version{Major = 2, Minor = 37}

        };

        var results = amounts.GroupBy(x => x.Major).MaxBy(c => c.Key).MaxBy(c => c.Minor);

        Console.WriteLine("Result " + results.Major + " " + results.Minor);

    }

}

​

public static class Extensions 

{

    public static IEnumerable<TSource> MaxsBy<TSource, TKey>(this IEnumerable<TSource> source, Func<TSource,TKey> keySelector)

    {

        return source.GroupBy(keySelector).MaxBy(g => g.Key);

    }

}