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Fix C# integer mappings and serialization - #12283
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Jorge Rangel (jorgerangel-msft) merged 2 commits intoOct 15, 2026
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fix(http-client-csharp): preserve integer types in generated clients
Fix C# integer mappings and serialization
Oct 15, 2026
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🟡 Changes recommended
Numeric collection support remains incomplete in request serialization and response deserialization.
2 open findings
What changed in this PR
Fixes C# integer mappings so generated SDKs preserve numeric types instead of using object.
Changes:
- Maps four integer types to their C# equivalents.
- Adds unsigned JSON serialization and lossless
ulongXML writes. - Updates tests and generated baselines.
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Jorge Rangel (jorgerangel-msft)
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Missing integer mappings caused
uint32[]to generateIList<object>, requiring custom SDK wrappers. This change preserves numeric types and fills the corresponding serialization gaps.int16,uint16,uint32, anduint64toshort,ushort,uint, andulong, including nullable types and collections.ulongXML writes.For a TypeSpec property declared as
bottom_right: uint32[], generate:rather than
IList<object>.