using System;

using System.Collections.Generic;

using System.Linq;

using System.Text.RegularExpressions;

​

public class Program

{

    private static readonly Regex r = new Regex(@"(\d+)\,(\d+)", RegexOptions.Compiled);

​

    public static void Main()

    {

        var r1 = r.Match("123,456");

        //first is total match

        Console.WriteLine(r1.Groups[0].Value);

        //Then first and second groups

        var left = int.Parse(r1.Groups[1].Value);

        var right = int.Parse(r1.Groups[2].Value);

        Console.WriteLine("Left "+ left);

        Console.WriteLine("Right "+right);

    }

}