Drag and Drop in UWP

Let's say we have a set of positions and we have to drag filled position and drop into empty position.
In UWP render the custom control and

1. add private field

   private DragDropGestureHandler dragAndDropHandler = new DragDropGestureHandler();
   

2. in OnElementPropertyChanged function

   protected override void OnElementChanged(ElementChangedEventArgs<PositionCustomView> e)
   {
   
       base.OnElementChanged(e);
   
       if (e.OldElement == null)
       {
           this.CanDrag = true;
           this.AllowDrop = true;
           this.DragOver += dragAndDropHandler.PositionCustomViewRenderer_DragOver;
           this.DragStarting += dragAndDropHandler.PositionCustomViewRenderer_DragStarting;
           this.Drop += dragAndDropHandler.PositionCustomViewRenderer_Drop;
       }
   
       if (e.NewElement == null)
       {
           this.CanDrag = false;
           this.AllowDrop = false;
           this.DragOver -= dragAndDropHandler.PositionCustomViewRenderer_DragOver;
           this.DragStarting -= dragAndDropHandler.PositionCustomViewRenderer_DragStarting;
           this.Drop -= dragAndDropHandler.PositionCustomViewRenderer_Drop;
       }
   }
   

3. DragDropGestureHandler

   public class DragDropGestureHandler
   
   {        
       public void PositionCustomViewRenderer_DragStarting(UIElement sender, DragStartingEventArgs args)
       {
           var viewRenderer = sender as PositionCustomViewRenderer;
           var element = viewRenderer?.Element;
           if (element.AllowMove)
           {
               args.Cancel = false;
               args.Data.Properties.Add("customView", (element));
               element.PositionMovingCommand?.Execute(element.Position);
           }
           else
           {
               args.Cancel = true;
           }
       }
   
   public async void PositionCustomViewRenderer_Drop(object sender, DragEventArgs e)
   {
       var viewRenderer = sender as PositionCustomViewRenderer;
       var element = viewRenderer?.Element;
       var result = e.DataView?.Properties?.
                   SingleOrDefault(p => p.Key == "customView" && p.Value.GetType() == typeof(PositionCustomView));
       var positionCustomView = result?.Value as PositionCustomView;
   
       element.PositionMovedCommand?.Execute(new Tuple<int, int?, int>(PositionCustomView.Position, PositionCustomView.SessionId, element.Position));
   }        
   
   public void PositionCustomViewRenderer_DragOver(object sender, DragEventArgs e)
   {
       var viewRenderer = sender as PositionCustomViewRenderer;
       var element = viewRenderer?.Element;
       if (element.AllowDrop)
       {
           e.AcceptedOperation = DataPackageOperation.Copy | DataPackageOperation.Move;
       }
       else
       {
           e.AcceptedOperation = DataPackageOperation.None;
       }
   }
   
   }