using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var arr = new int[] {1, 5, 2, 3, 5};

var highest = arr.Select((number,index)=> new {Index = index,Number = number})

                 .OrderByDescending(x=>x.Number)

                 .First();

        Console.WriteLine(highest);

    }

}