What's new in .NET 8 RC 2 [WIP]

[leecow]

What's new in .NET 8 RC 2

This issue is for teams to highlight work for the community that will release in .NET 8 RC 2

To add content, use a new conversation entry. The entry should include the team name and feature title as the first line shown in the template below.

Required

## Team Name: Feature title

[link to the tracking issue or epic item for the work]

Tell the story of the feature and anything the community should pay particular attention 
to be successful in using the feature.

Optional

Below are three additional items to consider. These will help the .NET 8 blog team and the community throughout the release.

• [ ] Link to documentation.
  • Where can we send people to learn more about the feature?
• [ ] Link to where you'd like people to provide feedback for this feature.
  • Where can people best comment on the direction of this feature?
• [ ] Whether you would like assistance from the .NET 8 writers to craft a story for this feature.
  • Please @JonDouglas or @JeremyLikness in your comment if so.

Index of .NET 8 releases

Preview 1: https://github.com/dotnet/core/issues/8133 Preview 2: https://github.com/dotnet/core/issues/8134 Preview 3: https://github.com/dotnet/core/issues/8135 Preview 4: https://github.com/dotnet/core/issues/8234 Preview 5: https://github.com/dotnet/core/issues/8436 Preview 6: https://github.com/dotnet/core/issues/8437 Preview 7: https://github.com/dotnet/core/issues/8438 RC 1: https://github.com/dotnet/core/issues/8439 RC 2: https://github.com/dotnet/core/issues/8440