How to get sum of absolute value of columns of data table
<p>I have below code</p>

<pre><code>using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Data;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            //Your code goes here         
            DataTable dt = new DataTable();
            dt.Columns.Add("Column1");
            dt.Columns["Column1"].DataType = typeof(Int32);
            dt.Rows.Add(1);
            dt.Rows.Add(2);
            dt.Rows.Add(-1);
            int a = Convert.ToInt32(dt.Compute("SUM(Column1)", "Column1 &lt; 10"));
            Console.WriteLine(a);
        }
    }
}
</code></pre>

<p>It will give op as 2, both +ve no will be added and -ve one will be subtracted . I need 4 as OP. I mean abs value of all. How to do it?</p>