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I am confused about dispose. I am trying to get my code disposing resources correctly. So I have been setting up my classes as IDisposable (with a Dispose method) them making sure that the Dispose method gets called. But now FXCop is telling me lots of stuff about disposing = false and calling Dispose(false) . I don't see a Dispose method that takes a bool. Do I need to make one? If so, why? Why not just have a method that gets called when it is disposing? I saw some code here: CA1063: Implement IDisposable correctly - Microsoft Docs that shows how to make a Dispose method that takes a bool . It says it is for native vs managed resourses. But I thought the whole point of dispose was for unmanaged resourses only. Also, the line that FXCop is complaining about is this: ~OwnerDrawnPanel() { _font.Dispose(); } It says: CA1063 : Microsoft.Design : Modify 'OwnerDrawnPanel.~OwnerDrawnPanel()' so that it calls Dispose(false) and then returns. But Font does not have a Dispose(bool) on it (that I can find). To sum it up: Why do I need a Dispose(bool) ? and if I do, why doesn't Font have it? and since it does not have it, why is FXCop asking me to use it? Thanks for all the great answers. I think I understand now. Here is The answer as I see it: Disposing of "unmanaged" resources falls into two categories: Resources that are wrapped in a managed class (ie Bitmap , Font etc), but still need Dispose to be called to clean them up properly. Resources that y

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