i faced an issue related to XamMaskedEditor control that preventing hosted window or view to be released and garbage collected.

i also create a support ticket with this problem but till infragistics team reply on me i tried to solve this issue and i found workaround to this issue and it works.

what i do is wrapping XamMaskedEditor control in any container control like panel, stack panel.....etc, and when i need to close my window or view for ex. Close Event, ViewClosing Event..... remove this panel children that means removing XamMaskedEditor control.

MyWindow.panelXamMasked.Children.Remove(MyWindow.XamMaskedEditorControl);