Port System.Runtime.Versioning.RequiresPreviewFeaturesAttribute triple slash to docs

[carlossanlop]

Ported with DocsPortingTool.

Targeting the net6-rc1 branch.

[carlossanlop]

[Suggestion removed, I placed this in the wrong line. See the next line]

[carlossanlop]

Note: The link is not active yet, but will be by the time we ship.

[gewarren]

Change to type="Article"? Also, who is writing the documentation?

[carlossanlop]

@pgovind @tannergooding are you going to take care of this document? It should be up before we ship this: https://aka.ms/dotnet-warnings/preview-features

[gewarren]

I've added the preview features properties to the MSBuild reference: https://docs.microsoft.com/en-us/dotnet/core/project-sdk/msbuild-props#enablepreviewfeatures. But I'll also plan to write a conceptual article.

[gewarren]

Change to type="Article"? Also, who is writing the documentation?

[opbld31]

Docs Build status updates of commit c142d84:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Runtime.Versioning/RequiresPreviewFeaturesAttribute.xml	✅Succeeded	View

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the docs.microsoft.com contributor guides
• Post your question in the Docs support channel

[pgovind]

Also, who is writing the documentation?

The docs team is my understanding, with me, @terrajobst and @jeffhandley helping. There's a design spec here: https://github.com/dotnet/designs/blob/main/accepted/2021/preview-features/preview-features.md. The
https://aka.ms/dotnet-warnings/preview-features link points to that page right now, but it'll need to come online at some point.