public override Size GetPreferredSize(Size constrainingSize) { ISupportToolStripPanel draggedControl = DraggedControl; Size preferredSize = Size.Empty; if (draggedControl.Stretch) { if (ToolStripPanelRow.Orientation == Orientation.Horizontal) { constrainingSize.Width = ToolStripPanelRow.Bounds.Width; preferredSize = _wrappedToolStrip.GetPreferredSize(constrainingSize); preferredSize.Width = constrainingSize.Width; } else { constrainingSize.Height = ToolStripPanelRow.Bounds.Height; preferredSize = _wrappedToolStrip.GetPreferredSize(constrainingSize); preferredSize.Height = constrainingSize.Height; } } else { preferredSize = (!_wrappedToolStrip.AutoSize) ? _wrappedToolStrip.Size : _wrappedToolStrip.GetPreferredSize(constrainingSize); } // return LayoutUtils.IntersectSizes(constrainingSize, preferredSize); return(preferredSize); }