private void Unregister()
 {
     if (this.Image != null)
     {
         WaterDynamics.UnregisterInteraction(this);
         this.Image = null;
     }
 }
 private void Unregister()
 {
     if (this.Image == null)
     {
         return;
     }
     WaterDynamics.UnregisterInteraction(this);
     this.Image = (WaterDynamics.Image)null;
 }