using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Text.RegularExpressions;

using System.Threading.Tasks;

​

namespace RegexTest1

{

    public class Program

    {

        public static void Main(string[] args)

        {

            string a = "\"foobar123==\"";

            Regex r = new Regex("^\"(.*)\"$");

            Match m = r.Match(a);

            if (m.Success)

            {

                foreach (Group g in m.Groups)

                {

                    Console.WriteLine(g.Index);

                    Console.WriteLine(g.Value);

                }

            }

        }

    }

}