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System.Runtime.CompilerServices.Unsafe NuGet package

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New versions of the System.Runtime.CompilerServices.Unsafe NuGet package will no longer be produced.

Previous behavior

New versions of the System.Runtime.CompilerServices.Unsafe NuGet package were produced with each new .NET [Core] version.

New behavior

Starting in .NET 7, new functionality will ship as part of the shared framework for .NET.

Version introduced

.NET 7 Preview 3

Reason for change

There were previously two different implementations of the Unsafe type: one that was referenced and used inside the core libraries, and one that shipped as a separate NuGet package. This duplicated code and was also a maintenance burden for JIT and AOT, so we unified the implementations. The NuGet package no longer needs to be produced, as the unified implementation of Unsafe ships as part of the shared framework for .NET.

You can continue to use older versions of the packages if you're targeting .NET 6 or earlier. But starting from .NET 7, you should remove the package dependency and instead use the API that comes as part of the shared framework.

Affected APIs