How to: Enable Reordering of ToolStrip Items at Run Time in Windows Forms
You can enable the user to rearrange ToolStripItem controls on the ToolStrip.
To enable ToolStripItem rearrangement at run time
Set the AllowItemReorder property to true. By default, AllowItemReorder is false.
At run time, the user holds down the ALT key and the left mouse button to drag a ToolStripItem to a different location on the ToolStrip.
toolStrip1.AllowItemReorder = TruetoolStrip1.AllowItemReorder = true;
See Also
Reference
ToolStrip Control Overview (Windows Forms)
ToolStrip
AllowItemReorder