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This is how you get rid of null reference exceptions forever

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Description

In this episode, Rich sits down with Immo to explore how the new new nullable reference types feature works for library and framework developers.

  • [00:00] Intro
  • [00:54] What are nullable reference types?
  • [03:46] Demo time!
  • [07:13] What's flow analysis?
  • [11:48] How does Debug.Assert work?
  • [13:17] Nullability and generics
  • [19:42] What process was used to annotate the framework?
  • [24:17] How powerful is the compiler analysis?
  • [27:33] What's the philosophy on annotating interfaces and virtuals?
  • [31:42] How do I enable nullable reference types?

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The Discussion

  • User profile image
    Ajay Tandon

    This is brilliant. However, when I turned nullable on I got ‘sqlnullvalueexception Data is Null’ when using entity framework core and using ToList() on the iqueryable. The stack trace is not particularly helpful, unfortunately. This all works fine when I remove the nullable from the csproj file, and I have investigated the ‘required’, with no success. Any advice on how to handle this. Is EF Core compatible with nullable?

    Thanks in advance for any insights you can provide.

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