Fixed problem where behavior was not correctly instantiated. Added null checking for sessions.

GazeWebSocketServer/GazeCoordinateBehavior.cs

@@ -30,7 +30,7 @@ namespace GazeWebSocketServer
 
         internal void Publish(GazeData gazeData)
         {
-            Sessions.Broadcast(gazeData.ToString());
+            Sessions?.Broadcast(gazeData.ToString());
         }
     }
 }

GazeWebSocketServer/Program.cs

@@ -9,8 +9,9 @@ namespace GazeWebSocketServer
     {
         public static void Main(string[] args)
         {
-            var wssv = new WebSocketServer("ws://localhost:8001");
-            wssv.AddWebSocketService("/gaze", () => new GazeCoordinateBehavior());
+            var wssv = new WebSocketServer(8001);
+            GazeCoordinateBehavior behavior = new GazeCoordinateBehavior();
+            wssv.AddWebSocketService("/gaze", () => behavior);
 
             wssv.Start();
             Console.ReadKey(true);