protocol and host from URL, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
              //This code return (protocol://)host:port from URL

//Commented URL's with different protocols. Just uncomment to test.
              //string url = "http://www.contoso.com:8080/letters/readme.html";
              //string url = "ftp://www.contoso.com:8080/letters/readme.html";
              //string url = "l2tp://1.5.8.6:8080/letters/readme.html";
              string url = "l2tp://1.5.8.6:8080/letters/readme.html";
            
              string host = "";//empty string with host from url
                    //protocol, (ip/domain), port
              host = Regex.Match(url, @"^(?<proto>\w+)://+?(?<host>[A-Za-z0-9\-\.]+)+?(?<port>:\d+)?/", RegexOptions.None, TimeSpan.FromMilliseconds(150)).Result("${proto}://${host}${port}");
                    //(ip/domain):port without protocol. If HTTPS board loading images from HTTP host.
              //host = Regex.Match(url, @"^(?<proto>\w+)://+?(?<host>[A-Za-z0-9\-\.]+)+?(?<port>:\d+)?/", RegexOptions.None, TimeSpan.FromMilliseconds(150)).Result("${host}${port}");
              
              Console.WriteLine("url: "+url+"\nhost: "+host); //display host
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,17 sec, absolute running time: 0,26 sec, cpu time: 0,25 sec, average memory usage: 17 Mb, average nr of threads: 4, absolute service time: 0,44 sec