public static Obstacle CreateNew(Layer layer)
 {
     if (string.IsNullOrEmpty(mContentManagerName))
     {
         throw new System.Exception("You must first initialize the factory to use it.");
     }
     Obstacle instance = null;
     instance = new Obstacle(mContentManagerName, false);
     instance.AddToManagers(layer);
     if (mScreenListReference != null)
     {
         mScreenListReference.Add(instance);
     }
     if (EntitySpawned != null)
     {
         EntitySpawned(instance);
     }
     return instance;
 }