How to restrict the expansion of TreeViewAdv items when you dragover?

You can restrict the expansion of TreeViewAdv items when you dragover by using the Boolean property IsExpandOnDrop.

Setting IsExpandOnDrop property:

The default value of IsExpandOnDrop property is true.

By default, when you dragover any TreeViewItemAdv in another TreeViewItemAdv, it gets expanded. To restrict this, you can set IsExpandOnDrop property to False in TreeViewAdv.

XAML

C#

Refer to the following screenshot.