.NET 10.0 Preview 4 May 2025 Update - .NET 10.0.0-preview.4 and SDK 10.0.100-preview.4

[dotnet-sb-bot]

Please use the v10.0.0-preview.4.25258.110 tag to source-build .NET version 10.0.0-preview.4.25258.110 / 10.0.100-preview.4.25258.110.

• Release Notes: https://github.com/dotnet/core/blob/main/release-notes/10.0/preview/preview4/10.0.0-preview.4.md
• Tag URL: https://github.com/dotnet/dotnet/releases/tag/v10.0.0-preview.4.25258.110

@dotnet/distro-maintainers

{
  "Channel": "10.0",
  "Runtime": "10.0.0-preview.4.25258.110",
  "Sdk": "10.0.100-preview.4.25258.110",
  "TagUrl": "https://github.com/dotnet/dotnet/releases/tag/v10.0.0-preview.4.25258.110",
  "OfficialBuildId": "20250508.10"
}

Release Notes

Official Build ID

This release has changes related to the official build ID. With Preview 4, all Microsoft-built NuGet packages have the same package version which is based on the value of the official build ID. It is important to make use of this same build ID when doing an official source build release in order for the output SDK to expect the same package versions that will exist in nuget.org from Microsoft packages.

There are two ways to provide the official build ID:

• The official build ID is contained in the release manifest JSON file attached to this release. When passing this JSON file to the --release-manifest option of the build.sh script, the build will implicitly use the official build ID set in that JSON file.
• Alternatively, if you're not making use of the release manifest JSON file, you can explicitly pass the official build ID as an MSBuild property to the build.sh script: /p:OfficialBuildId=20250508.10. You can get the official build ID value either from the release manifest file or via the JSON snippet above which will be included with each release.

The way in which the official build ID is provided (or not needed at all) will be subject to change in the future. Follow #5109 for more on that.

When doing a dev build and not providing an official build ID, you'll be required to provide the following MSBuild property to the build.sh script: /p:DisableDevBuildAsDefaultForSourceOnly=true. This is a temporary requirement that will eventually be resolved by #5061.

[mthalman]

I updated the initial post with some important release notes.