Who contributed to .NET on July 14, 2026?

7 developers shipped this update, including Parker Bibus, tannergooding, baronfel, ViktorHofer, dependabot, Alexander Köplinger, and dotnet-maestro.

What were the notable .NET updates?

Fix decimal to/from floating-point conversions to round correctly, Fix rounding of BigInteger conversions to floating-point types, and Implement Decimal32/64/128 arithmetic and comparison operators.

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The Wire · Showcase

RUNTIME FIXES DECIMAL AND BIGINTEGER ROUNDING BUGS THAT LOST PRECISION

By RepoJournal · Filed 07:00 UTC on July 14, 2026 · About .NET

7 people shipped this

tannergooding @tannergooding 3 cited

dotnet-maestro @dotnet-maestro 3 cited

Parker Bibus @LoopedBard3 1 cited

baronfel @baronfel 1 cited

ViktorHofer @ViktorHofer 1 cited

dependabot @dependabot

Alexander Köplinger @akoeplinger

Three critical numeric conversion bugs that silently corrupted precision in decimal, BigInteger, and floating-point math are now fixed across the stack.

The runtime team shipped fixes for long-standing rounding failures that affected decimal-to-float conversions [1], BigInteger-to-double casts [2], and the new Decimal32/64/128 types [3]. The decimal fix is the most urgent: conversions like (double)10000000000000.099609375m were producing wrong results because intermediate rounding steps compounded precision loss. The BigInteger fix addresses a truncation bug that bypassed normal IEEE rounding entirely, affecting any code casting large integers to double. Meanwhile, MSBuild tightened partial evaluation semantics [5], restricting it to ProjectInstance to prevent cached Project objects from serving stale state. The MSBuild task analyzer package gained two new Roslyn rules [6] that flag string-based task parameters and suggest migration to typed alternatives (AbsolutePath, FileInfo, ITaskItem<T>), improving type safety in build logic. BenchmarkDotNet advanced to nightly build 0.16.0-nightly.20260703.576 [4] with a bump to Microsoft.Extensions 10.0.3 to resolve transitive dependency conflicts. All major repos (runtime, aspnetcore, sourcelink) flowed into dotnet/dotnet overnight [ref:15, ref:16, ref:17].

Action items

→ If you cast decimals or BigIntegers to floating-point types, rebuild with the latest runtime to verify precision dotnet/runtime [immediate]
→ Audit MSBuild task parameters for string-based paths and apply the new MSBuildTask0006/0007 analyzers dotnet/msbuild [plan]
→ Review any code using Project.PartialEvaluate; move to ProjectInstance if you need partial evaluation semantics dotnet/msbuild [plan]

References

[1] Fix decimal to/from floating-point conversions to round correctly ↗ dotnet/runtime
[2] Fix rounding of BigInteger conversions to floating-point types ↗ dotnet/runtime
[3] Implement Decimal32/64/128 arithmetic and comparison operators ↗ dotnet/runtime
[4] Update BenchmarkDotNet to 0.16.0-nightly.20260703.576 ↗ dotnet/performance
[5] Restrict partial evaluation to ProjectInstance ↗ dotnet/msbuild
[6] Add Roslyn analyzers (MSBuildTask0006/0007) to suggest typed task parameters ↗ dotnet/msbuild
[7] [main] Source code updates from dotnet/sourcelink ↗ dotnet/dotnet
[8] [main] Source code updates from dotnet/runtime ↗ dotnet/dotnet
[9] [main] Source code updates from dotnet/aspnetcore ↗ dotnet/dotnet

Quick answers

What shipped in .NET on July 14, 2026?: Three critical numeric conversion bugs that silently corrupted precision in decimal, BigInteger, and floating-point math are now fixed across the stack. In total, 60 commits and 62 pull requests landed.
Who contributed to .NET on July 14, 2026?: 7 developers shipped this update, including Parker Bibus, tannergooding, baronfel, ViktorHofer, dependabot, Alexander Köplinger, and dotnet-maestro.
What were the notable .NET updates?: Fix decimal to/from floating-point conversions to round correctly, Fix rounding of BigInteger conversions to floating-point types, and Implement Decimal32/64/128 arithmetic and comparison operators.

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