Gets or sets whether to allow the end-user to resize items by dragging selection handles. This is a dependency property.
true to allow the end-user to resize items by dragging selection handles; otherwise, false.
Setting the AllowResizeItems property to false doesn't prevent the end-user from changing the width and height of items in the Properties Panel.
You can restrict end-user operations by setting the DiagramControl.IsReadOnly property to true. Setting the desired diagram protection options (listed in the DiagramControl.IsReadOnly property's description) to true overrides the IsReadOnly property.