ObservableCollection<T>.CollectionChanged Caveat

DO NOT return null values from collection properties or from methods returning collections. Return an empty collection or an empty array instead….

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Context: This post was automatically imported from my old blog, which was originally hosted on Microsoft’s ASP.NET Community Blogs. When they shut it down, I dumped all of my old posts to Wordpress. You can still check out the original blog on the Wayback Machine.