c# - WPF DisconnectedItem issue -
i have problem concerning issue of disconnecteditem in wpf bindings.
i should have list namely provincelist , in each province have observablecollection wich bound itemssource property of listbox.
the issue comes when phone call provincelist.clear() when visual studio throws , invalidcastexception exception , when trace see cast object city returning disconnecteditem.
i have no thought problem is. help appreciated.
c# wpf binding
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