port scanner usando la Task Parallel Library

Poderoza la Task Parallel Library, dejo un ejemplo bastante simple de un port scanner que hace su trabajo en paralelo pero sin crear un solo thread en forma explícita. Toda la magia está en:

Parallel.For(from, to, (port) => {});

class Program
{
 static void Main(string[] args)
 {
     if (args.Length < 2 || args.Length > 3)
         throw new ArgumentException();

     var to = 0;
     var from = 0;
     var host = args[0];         

     #region argument validation
     //...
     #endregion

     Console.WriteLine("Scanning {0} ports from: {1} to {2}", host, from, to - 1);

     // parallel port scan
     Parallel.For(from, to, (port) =>
     {
         var tcpScan = new TcpClient();

         try
         {
             tcpScan.Connect(host, port);

             if (tcpScan.Connected)
                 Console.WriteLine("Listening on port: {0}", port);
         }
         catch (Exception)
         {
         }
         finally
         {
             if (tcpScan.Connected)
                 tcpScan.Close();                 
         }
     });         

     Console.ReadKey();
 }
}