Gets or sets a value indicating whether drag-and-drop and item reordering are handled through events that you implement.
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Set the ToolStrip.AllowDrop property to true and set the ToolStrip.AllowItemReorder property to false to respond to drag-and-drop behavior you have defined in the Control.DragEnter, Control.DragLeave, and Control.DragDrop events.
Set ToolStrip.AllowDrop to false and set ToolStrip.AllowItemReorder to true to cause the System.Windows.Forms.ToolStrip class to handle drag-and-drop and item reordering automatically. Set ToolStrip.AllowItemReorder to true for two System.Windows.Forms.ToolStrip objects to allow dragging of items from one System.Windows.Forms.ToolStrip to the other. To enable the default drag-and-drop, the ALT key must be pressed during the drag operation.
Setting both ToolStrip.AllowDrop and ToolStrip.AllowItemReorder to true throws an exception.