Earlier this month Microsoft released .NET Core 3.0 Preview 8 for Windows, macOS, and Linux.
The new release contains bug fixes and enhancements for the ASP.NET Core, CoreFX, and CoreCLR product areas. There are no new features since the framework entered the freezing period in the previous release, and all development efforts are focused on stability and reliability.
ASP.NET Core was the product area most affected by this release. Some of the project templates were updated, like the Angular template (updated to Angular 8). Blazor logging and diagnostics capabilities were improved, along with gRPC diagnostics. Other enhancements include the addition of new networking primitives for non-HTTP servers, case-sensitive component binding, and culture-aware data binding. More details on the ASP.NET Core updates can be found here.
CoreFX received multiple bug fixes and enhancements for the System.Text.Json API, while Core CLR received bug fixes related to diagnostics and exception handling in Linux environments. A complete list of all bug fixes and releases for all affected product areas can be found here.
This preview of .NET Core 3.0 is supported by Microsoft and can be used in production: the Microsoft .NET Site has already been updated with the new release. With the final 3.0 release scheduled for next month, Microsoft officially recommends the start of adoption planning for .NET Core 3.0.