Null & Void - Everything about Nothing in .NET
summary
Step-by-step, the session shows that C# nullable reference types are compile-time annotations (implemented as attributes with context codes 0/1/2), demonstrates reading them via reflection using NullabilityInfoContext, and inspects Roslyn/IL output to prove there’s no runtime type change. Demos cover System.Text.Json’s respectNullableAnnotations option, F# 9 interop, a source-analyzer+fixer workflow and PolySharp source-generator for older targets, the null-forgiving operator ! and the null object pattern, and recommends turning nullable warnings into errors in CI to enforce safety.
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chapters (17)
- 0:00Introduction
- 3:34Understanding void
- 5:36Nullable reference types
- 11:31Value types vs reference types
- 15:01Ref keywords and nullability
- 18:42Design and contract patterns
- 21:08Compiler mechanics
- 24:41Defaults and arrays
- 28:45Handling null with operators
- 35:18Configuring nullable contexts
- 38:27JSON serialization and interop
- 42:58Suppression and generated code
- 47:21Generics and nullability
- 50:59Advanced attributes
- 53:43Reflection and analyzers
- 57:26Adoption strategies
- 1:00:45Null-avoidance patterns
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