using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string p = "Traget server is @@SERVER@@ and with port @@PORT@@";

        Regex reg = new Regex(@"@@(.+?)@@");

        MatchCollection matches = reg.Matches(p);

        foreach (Match m in matches)

        {

            Console.WriteLine("Entire Token is " + m.Value);

            Console.WriteLine("Token is " + m.Groups[1].Value);

        }

    }

}