Microsoft announced the availability of .NET 8 Preview 4, packed with numerous exciting enhancements for ASP.NET Core. In this preview release, Microsoft introduce several notable features and improvements. Here's a summary of what you can expect:

Blazor:

• Experience streaming rendering with Blazor components, allowing for more efficient and dynamic web application development.
• Explore enhanced support for handling form posts with Blazor SSR (Server-Side Rendering), ensuring smooth and seamless form interactions.
• Take advantage of the ability to route to named elements in Blazor, enhancing navigation and interactivity within your Blazor applications.
• Leverage Webcil packaging for Blazor WebAssembly apps, streamlining deployment and packaging processes.

API authoring:

• Enjoy expanded support for form binding in minimal APIs, making it easier to handle and bind form data within your API projects.
• Benefit from the inclusion of the .http file in the API project template, enabling convenient API testing and exploration.
• Native AOT (Ahead-of-Time) compilation is now supported, offering improved logging and exception-handling capabilities in compile-time generated minimal APIs.
• ASP.NET Core top-level APIs are now annotated for trim warnings, ensuring optimized app size by eliminating unnecessary dependencies.
• Experience reduced app size by configuring HTTPS support to suit your specific needs.

Worker Service template updates:

• Discover additional default services configured in the slim builder, simplifying the process of building worker service applications.
• API template JSON configuration changes have been implemented, enhancing flexibility and customization options.

Authentication and authorization:

• Take advantage of new Identity API endpoints, facilitating seamless integration and management of user identities within your applications.
• Enjoy improved support for custom authorization policies with the introduction of IAuthorizationRequirementData, offering enhanced control over access and permissions.

ASP.NET Core metrics:

• Benefit from various enhancements and optimizations in ASP.NET Core metrics, ensuring better monitoring and performance analysis capabilities for your applications.

For a more comprehensive understanding of the ASP.NET Core developments planned for .NET 8, please refer to the Microsoft website.