using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public void Main()

    {

        List<Test> link = Test.FetchList();

​

        var result = link.Select((x, i) => new { x.Prop1, x.Prop2, index = i })

                         .Max(y => new Result {value = Math.Abs(y.Prop1 - y.Prop2), index = y.index});

​

        result.Dump(); // In this case result would be index 2

​

    }

}

​

public class Test

{

    public int Prop1 { get; set;}

​

    public int Prop2 { get; set;}

​

    public static List<Test> FetchList()

    {

      var returnList = new List<Test>();

​

        returnList.Add(new Test { Prop1 = 1, Prop2 = -335});

        returnList.Add(new Test { Prop1 = 2, Prop2 = -5});

        returnList.Add(new Test { Prop1 = 1, Prop2 = -9});

        returnList.Add(new Test { Prop1 = 3, Prop2 = -2});

        returnList.Add(new Test { Prop1 = 21, Prop2 = 15});

​

      return (returnList);

    }

​

}

​

public class Result : IComparable<Result>

{

    public int value { get; set; }

​

    public int index { get; set; }

​

    public int CompareTo(Result other)

    {

       return (value - other.value);

    }

}