ASP.NET Core updates in .NET 5 Preview 3

Sourabh Shirhatti [MSFT]

.NET 5 Preview3 is now available and is ready for evaluation! .NET 5 will be a current release.

Get started

To get started with ASP.NET Core in .NET 5.0 Preview3 install the .NET 5.0 SDK.

If you’re on Windows using Visual Studio, we recommend installing the latest preview of Visual Studio 2019 16.6.

If you’re on macOS, we recommend installing the latest preview of Visual Studio 2019 for Mac 8.6.

Upgrade an existing project

To upgrade an existing ASP.NET Core 5.0 preview2 app to ASP.NET Core 5.0 preview3:

  • Change the TFM in your *.csproj file from netcoreapp5.0 to net5.0
  • Update all Microsoft.AspNetCore.* package references to 5.0.0-preview.3.20215.14.
  • Update all Microsoft.Extensions.* package references to 5.0.0-preview.3.20215.2.

See the full list of breaking changes in ASP.NET Core 5.0.

That’s it! You should now be all set to use .NET 5 Preview3.

What’s new?

Performance Improvements to HTTP/2

By significantly reducing allocations in the HTTP/2 code path and adding support for HPack static compression of HTTP/2 response headers in Kestrel, the 5.0.0-prevew3 release improves the performance of HTTP/2.

We expect to announce additional features in upcoming preview releases. See the release notes for additional details and known issues.

Give feedback

We hope you enjoy this release of ASP.NET Core in .NET 5! We are eager to hear about your experiences with this latest .NET 5 release. Let us know what you think by filing issues on GitHub.

Thanks for trying out ASP.NET Core!

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