When can I dispose an IDisposable WPF control e.g. WindowsFormsHost?

Question

The WPF control WindowsFormsHost inherits from IDisposable.

If I have a complex WPF visual tree containing some of the above controls what event or method can I use

Answer 1

You don't need to dispose controls when closing a form, the API will do it for you automatically if the control is in the visual tree of the form ( as a child of the form or other control in the form)