migrate-nullable-references

Nullable reference types are a C# compiler feature that tracks null state to prevent NullReferenceException risks. This Skill automates adopting them by enabling the setting and annotating your public API surfaces for robust null-safety.

Annotating public API surfaces involves adding nullable attributes to method signatures and properties exposed by your library. This Skill automates that annotation process to ensure reliable nullability information for consumers and systematically resolves CS86xx warnings.

Migrating a large legacy .NET application to use nullable reference types is the primary use case for this Skill. It systematically resolves CS86xx compiler warnings and enables the `<Nullable>enable</Nullable>` setting to improve code safety and maintainability.

Enabling nullable reference types generates CS86xx compiler warnings because the C# analyzer flags existing code where reference types might hold null values without explicit annotations. This Skill automates resolving these warnings by applying accurate nullability annotations.