diff --git a/ErgometerLibrary/FileHandler.cs b/ErgometerLibrary/FileHandler.cs
index 4a0e52e..87cd890 100644
--- a/ErgometerLibrary/FileHandler.cs
+++ b/ErgometerLibrary/FileHandler.cs
@@ -8,6 +8,9 @@ namespace ErgometerLibrary
 {
     class FileHandler
     {
-
+        public static int GenerateSession()
+        {
+            return 0;
+        }
     }
 }
diff --git a/ErgometerLibrary/Meting.cs b/ErgometerLibrary/Meting.cs
index b0b352d..f0741b0 100644
--- a/ErgometerLibrary/Meting.cs
+++ b/ErgometerLibrary/Meting.cs
@@ -45,11 +45,31 @@ namespace ErgometerLibrary
             return temp;
         }
 
+        public string ToCommand()
+        {
+            string temp = "";
+            temp += HeartBeat + "»";
+            temp += RPM + "»";
+            temp += Speed + "»";
+            temp += Distance + "»";
+            temp += Power + "»";
+            temp += Energy + "»";
+            temp += Seconds + "»";
+            temp += ActualPower + "»";
+            temp += TimeStamp;
+            return temp;
+        }
+
         public static Meting Parse(string input)
         {
-            String[] status = input.Split('\t');
+            return Parse(input, '\t');
+        }
 
-            if (status.Length != 8)
+        public static Meting Parse(string input, char delimiter)
+        {
+            String[] status = input.Split(delimiter);
+
+            if (status.Length != 8 || status.Length != 9)
                 return null;
 
             int heartbeat = int.Parse(status[0]);
@@ -60,10 +80,16 @@ namespace ErgometerLibrary
             int energy = int.Parse(status[5]);
             int actualpower = int.Parse(status[7]);
 
+            double timestamp = 0;
+            if (status.Length == 9)
+                timestamp = double.Parse(status[8]);
+            else
+                timestamp = (DateTime.Now - DateTime.Parse("1/1/1870 0:0:0")).TotalMilliseconds;
+
             string[] temp = status[6].Split(':');
             int seconds = (int.Parse(temp[0]) * 60) + (int.Parse(temp[1]));
 
-            return new Meting(heartbeat, rpm, speed, distance, power, energy, seconds, actualpower, (DateTime.Now - DateTime.Parse("1/1/1870 0:0:0")).TotalMilliseconds);
+            return new Meting(heartbeat, rpm, speed, distance, power, energy, seconds, actualpower,timestamp);
         }
     }
 }
diff --git a/ErgometerLibrary/NetCommand.cs b/ErgometerLibrary/NetCommand.cs
index a1bc505..adab0f5 100644
--- a/ErgometerLibrary/NetCommand.cs
+++ b/ErgometerLibrary/NetCommand.cs
@@ -8,16 +8,157 @@ namespace ErgometerLibrary
 {
     class NetCommand
     {
+        public enum CommandType { LOGIN, DATA, CHAT, LOGOUT };
+
 
-        public int Session { get; set; }
-        public string DisplayName { get; set; }
         public double Timestamp { get; set; }
+        public int Session { get; set; }
+        public CommandType Type { get; set; }
+        public string DisplayName { get; set; }
+        public bool IsDoctor { get; set; }
+        public string Password { get; set; }
+        public string ChatMessage { get; set; }
+        public Meting Meting { get; set; }
 
-        public NetCommand(int session, string displayname)
+
+        public NetCommand(CommandType commandtype, int session)
         {
+            Type = commandtype;
             Session = session;
-            DisplayName = displayname;
             Timestamp = (DateTime.Now - DateTime.Parse("1/1/1870 0:0:0")).TotalMilliseconds;
         }
+
+        public NetCommand(Meting m, int session)
+        {
+            Type = CommandType.DATA;
+            Session = session;
+            Timestamp = (DateTime.Now - DateTime.Parse("1/1/1870 0:0:0")).TotalMilliseconds;
+
+            Meting = m;
+        }
+
+        public NetCommand(string chat, int session)
+        {
+            Type = CommandType.CHAT;
+            Session = session;
+            Timestamp = (DateTime.Now - DateTime.Parse("1/1/1870 0:0:0")).TotalMilliseconds;
+
+            ChatMessage = chat;
+        }
+
+        public NetCommand(string name, bool doctor, int session)
+        {
+            Type = CommandType.LOGIN;
+            Session = session;
+            Timestamp = (DateTime.Now - DateTime.Parse("1/1/1870 0:0:0")).TotalMilliseconds;
+
+            DisplayName = name;
+            IsDoctor = doctor;
+        }
+
+        public NetCommand Parse(string command)
+        {
+            string[] com = command.Split('»');
+
+            int comType = int.Parse(com[0]);
+            int session = 0;
+            if (com[1].StartsWith("ses"))
+                session = int.Parse(com[1].Substring(3));
+            else
+                throw new FormatException("Error in NetCommend: " + com[1] + " is not a valid session.");
+
+            string[] args = (string[]) com.Skip(2);
+
+            switch (comType)
+            {
+                case 1:
+                    return ParseLoginRequest(session, args);
+                case 2:
+                    return ParseData(session, args);
+                case 3:
+                    return ParseChatMessage(session, args);
+                case 4:
+                    return ParseLogoutRequest(session, args);
+                default:
+                    throw new FormatException("Error in NetCommand: " + comType + " is not a valid command type.");
+            }
+        }
+
+        private NetCommand ParseLogoutRequest(int session, string[] args)
+        {
+            if (args.Length != 1)
+                throw new MissingFieldException("Error in NetCommand: Logout Request is missing arguments");
+
+            NetCommand temp = new NetCommand(CommandType.LOGOUT, session);
+            if (args[0] != "logout")
+                throw new FormatException("Error in NetCommand: " + args[0] + " is not a valid logout request");
+
+            return temp;
+        }
+
+        private NetCommand ParseChatMessage(int session, string[] args)
+        {
+            if (args.Length != 1)
+                throw new MissingFieldException("Error in NetCommand: Chat Message is missing arguments");
+
+            NetCommand temp = new NetCommand(CommandType.CHAT, session);
+            temp.ChatMessage = args[0];
+
+            return temp;
+        }
+
+        private NetCommand ParseData(int session, string[] args)
+        {
+            if (args.Length != 9)
+                throw new MissingFieldException("Error in NetCommand: Data is missing arguments");
+
+            NetCommand temp = new NetCommand(CommandType.DATA, session);
+            temp.Meting = Meting.Parse(string.Join("\t", args));
+
+            return temp;
+        }
+
+        private NetCommand ParseLoginRequest(int session, string[] args)
+        {
+            bool doctor = bool.Parse(args[1]);
+            if (doctor && args.Length != 5)
+                throw new MissingFieldException("Error in NetCommand: Doctor login is missing arguments");
+            else if(args.Length != 4)
+                throw new MissingFieldException("Error in NetCommand: Client login is missing arguments");
+
+            NetCommand temp = new NetCommand(CommandType.LOGIN, session);
+            temp.IsDoctor = doctor;
+            temp.DisplayName = args[0];
+            if (doctor)
+                temp.Password = args[2];
+
+            return temp;
+        }
+
+        public override string ToString()
+        {
+            string command = "";
+
+            switch(Type)
+            {
+                case CommandType.LOGIN:
+                    command += "1»ses" + Session + "»" + DisplayName + "»" + IsDoctor + (IsDoctor ? "»" + Password : "");
+                    break;
+                case CommandType.DATA:
+                    command += "2»ses" + Session + "»" + Meting.ToCommand();
+                    break;
+                case CommandType.CHAT:
+                    command += "3»ses" + Session + "»" + ChatMessage;
+                    break;
+                case CommandType.LOGOUT:
+                    command += "4»ses" + Session + "»logout";
+                    break;
+
+                default:
+                    throw new FormatException("Error in NetCommand: Cannot find type of command");
+            }
+
+            return command;
+        }
     }
 }