Created a server (no real functionality yet).

ErgometerServer/Program.cs

@@ -1,7 +1,11 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
+using System.Net;
+using System.Net.Sockets;
 using System.Text;
+using System.Threading;
 using System.Threading.Tasks;
 
 namespace ErgometerServer
@@ -10,7 +14,45 @@ namespace ErgometerServer
     {
         static void Main(string[] args)
         {
+            new Program();
+        }
 
+        public Program()
+        {
+            IPAddress localhost; //= IPAddress.Parse("127.0.0.1");
+
+            bool ipIsOk = IPAddress.TryParse("127.0.0.1", out localhost);
+            if (!ipIsOk) { Console.WriteLine("ip adres kan niet geparsed worden."); Environment.Exit(1); }
+
+            TcpListener listener = new System.Net.Sockets.TcpListener(localhost, 80);
+            listener.Start();
+
+            while (true)
+            {
+                Console.WriteLine("Waiting for connection with client");
+
+                //AcceptTcpClient waits for a connection from the client
+                TcpClient client = listener.AcceptTcpClient();
+
+                Console.WriteLine("Connection established");
+
+                Thread thread = new Thread(HandleClientThread);
+                thread.Start(client);
+            }
+        }
+
+        static void HandleClientThread(object obj)
+        {
+            TcpClient client = obj as TcpClient;
+            StreamReader reader = new StreamReader(client.GetStream(), Encoding.ASCII);
+            StreamWriter stream = new StreamWriter(client.GetStream(), Encoding.ASCII);
+            string q = reader.ReadLine();
+            if(q == "1«")
+            Console.WriteLine(q);
+
+            stream.Flush();
+            stream.Close();
+            reader.Close();
         }
     }
 }