added methods to send to all in lobby

SharedClientServer/ClientServerUtil.cs

@@ -8,6 +8,15 @@ namespace SharedClientServer
 {
     class ClientServerUtil
     {
+        // creates a message array to send to the server or to clients
+        public byte[] createPayload(byte id, string payload)
+        {
+            byte[] stringAsBytes = Encoding.ASCII.GetBytes(payload);
+            byte[] res = new byte[stringAsBytes.Length + 1];
+            res[0] = id;
+            Array.Copy(stringAsBytes, 0, res, 1, stringAsBytes.Length);
+            return res;
+        }
 
     }
 }

SharedClientServer/JSONConvert.cs

@@ -13,5 +13,12 @@ namespace SharedClientServer
             dynamic payload = JsonConvert.DeserializeObject(msg);
             return (payload.username, payload.message);
         }
+
+        public static string GetUsernameLogin(byte[] json)
+        {
+            string msg = Encoding.ASCII.GetString(json);
+            dynamic payload = JsonConvert.DeserializeObject(msg);
+            return payload.username;
+        }
     }
 }

SharedClientServer/Lobby.cs

@@ -13,12 +13,24 @@ namespace Client
         private int _id;
         private int _playersIn;
         private int _maxPlayers;
+        private List<string> _usernames;
+
+        public void AddUsername(string username, out bool success)
+        {
+            success = false;
+            if (_usernames.Count < _maxPlayers)
+            {
+                _usernames.Add(username);
+                success = true;
+            }
+        }
 
         public Lobby(int id, int playersIn, int maxPlayers)
         {
             _id = id;
             _playersIn = playersIn;
             _maxPlayers = maxPlayers;
+            _usernames = new List<string>();
         }
 
         public int ID

SharedClientServer/SharedClientServer.projitems

@@ -11,6 +11,7 @@
   <ItemGroup>
     <Compile Include="$(MSBuildThisFileDirectory)ClientServerUtil.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)JSONConvert.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Lobby.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ObservableObject.cs" />
   </ItemGroup>
 </Project>