WPF MVVM: how to bind GridViewColumn to ViewModel-Collection?

Question

In my View I got a ListView bound to a CollectionView in my ViewModel, for example like this:

Answer 1

I think this code would cause some memory leak issues; As your class GridViewColumns described, you've defined a static dictionary "_gridViewsByColumnsSource" in which contains the gridviews and their columns source references; so this is a strong reference to the added gridviews and columns source; Because this dictionary is static, it seems that there's a static reference "point" to the gridviews and columns source data all the time, if the screen in which the gridview defined closed, the gridview cannot be collected by GC if GC is started; As more and more similar screens opened, more and more gridviews and its columns source data cannot be collected, there'll be memory leak at the end.