//Rextester.Program.Main is the entry point for your code. Don't change it.

//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

​

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text.RegularExpressions;

using System.Data;

using System.Data.SqlClient;

​

namespace Rextester

{

    public class Program

    {

        public static void Main(string[] args)

        {

            //Your code goes here

            int[] anArray = { 1, 5, 2, 7 };

            DataTable dt = new DataTable();

            dt.Columns.AddRange(new DataColumn[2] { new DataColumn("index"), new DataColumn("val")});

            dt.Columns["index"].AutoIncrement = true;

            dt.Columns["index"].AutoIncrementSeed = 1;

            dt.Columns["index"].AutoIncrementStep = 1;

            foreach(int i in anArray)

                dt.Rows.Add(null, i);

            DataRow[] dr = dt.Select("[val] = MAX([val])");

            Console.WriteLine("Max Value = {0}, Index = {1}", dr[0][1], dr[0][0]);

        }

    }

}