Drop on a RadGridView : getting the targeted row

        public RadForm1()
        {
            InitializeComponent();

            for (int i = 0; i < 5; i++)
            {
                this.treeView1.Nodes.Add("Item" + i);
            }

            this.radGridView1.Columns.Add("Name");
            this.radGridView1.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
            for (int i = 0; i < 5; i++)
            {
                this.radGridView1.Rows.Add(Guid.NewGuid().ToString());
            }

            this.radGridView1.AllowDrop = true;

            this.treeView1.ItemDrag += TreeView1_ItemDrag; 
            this.radGridView1.DragOver += RadGridView1_DragOver;
            this.radGridView1.DragDrop += RadGridView1_DragDrop;
        }

        private void RadGridView1_DragDrop(object sender, DragEventArgs e)
        {
            var targetLocation = this.radGridView1.PointToClient(new Point(e.X, e.Y));
            GridDataCellElement elementUnderMouse = this.radGridView1.ElementTree.GetElementAtPoint(targetLocation) as GridDataCellElement;
            if (elementUnderMouse != null)
            {
                int rowIndex = this.radGridView1.Rows.IndexOf(elementUnderMouse.RowInfo);
                GridViewRowInfo row = this.radGridView1.Rows.NewRow();
                // Retrieve the node that was dragged.  
                TreeNode draggedNode = (TreeNode)e.Data.GetData(typeof(TreeNode));
                row.Cells["Name"].Value = draggedNode.Text;
                this.radGridView1.Rows.Insert(rowIndex, row);
            }
        }

        private void RadGridView1_DragOver(object sender, DragEventArgs e)
        {
            var targetLocation = this.radGridView1.PointToClient(new Point(e.X, e.Y));
            GridDataCellElement elementUnderMouse = this.radGridView1.ElementTree.GetElementAtPoint(targetLocation) as GridDataCellElement;
            if (elementUnderMouse != null)
            {
                Console.WriteLine(elementUnderMouse);
                e.Effect = e.AllowedEffect;
            }
            else
            {
                e.Effect = DragDropEffects.None;
            }
        } 
        private void TreeView1_ItemDrag(object sender, ItemDragEventArgs e)
        {
            // Move the dragged node when the left mouse button is used.  
            if (e.Button == MouseButtons.Left)
            {
                DoDragDrop(e.Item, DragDropEffects.Move);
            }

            // Copy the dragged node when the right mouse button is used.  
            else if (e.Button == MouseButtons.Right)
            {
                DoDragDrop(e.Item, DragDropEffects.Copy);
            }
        } 

        private void TreeView1_MouseDown(object sender, MouseEventArgs e)
        {
            throw new NotImplementedException();
        }

        private void TreeView1_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left && this.treeView1.SelectedNode != null)
            {
                this.treeView1.DoDragDrop(this.treeView1.SelectedNode.Text, 
                    DragDropEffects.Copy | DragDropEffects.Move);
            }
        }