or
[System.NullReferenceException] = {"Object reference not set to an instance of an object."}Source: Telerik.WinControls.GridView at Telerik.WinControls.UI.GridVisualElement.GetElementAtPoint[T](ComponentElementTree componentTree, Point point) at Telerik.WinControls.UI.GridRowBehavior.GetRowAtPoint(Point point) at Telerik.WinControls.UI.GridRowBehavior.SelectPositionOnMouseDownLeft(MouseEventArgs e, GridRowElement rowElement, GridCellElement cellElement) at Telerik.WinControls.UI.GridRowBehavior.OnMouseDownLeft(MouseEventArgs e) at Telerik.WinControls.UI.GridRowBehavior.OnMouseDown(MouseEventArgs e) at Telerik.WinControls.UI.BaseGridBehavior.OnMouseDown(MouseEventArgs e) at Telerik.WinControls.UI.RadGridView.OnMouseDown(MouseEventArgs e) at System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at Telerik.WinControls.RadControl.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)