News

Blazor Debugging Boosted in .NET 5 RC 2

In highlighting updates to ASP.NET Core in the just-launched second and final Release Candidate of .NET 5, Microsoft pointed out better debugging for Blazor, the red-hot project that allows for C# coding of web projects.

Blazor lives in the ASP.NET Core space of .NET 5, which just today (Oct. 13) was announced in RC 2, the last stop before an official Nov. 10 debut during the company's .NET Conf 2020 online event.

With its revolutionary take on Microsoft-centric web development -- enabled by WebAssembly -- Blazor was featured prominently in the ASP.NET Core updates post.

Front and center in the list of Blazor improvements were Blazor WebAssembly debugging improvements.

The gamut of improvements to debugging in Blazor WebAssembly -- the client-side component of Blazor that works alongside the server-side component called Blazor Server -- include:

  • Various reliability improvements, including fixing the port conflict issue from RC1
  • Improved support for stepping over and out of async methods
  • Inspect locals or object properties in many previously unsupported situations including:
    • For inherited members
    • For multicast delegates
    • For boxed values
    • For Nullable<T> values
    • Within reflection-based calls
  • Support for debugging lazy loaded assemblies

Other RC 2 Blazor updates called out for special attention in the post include:

  • Blazor CSS isolation improvements: This feature was introduced in an earlier preview, but improved further in .NET 5 RC 2:
    • "Previously, all component scoped CSS files including files from referenced projects or packages were compiled into a single bundle, scoped.styles.css. We now produce one bundle per referenced project or package and include those bundles into the app bundle through CSS @import statements."
    • "The bundle names are now based on the project names: {project_name}.styles.css. Each bundle can be referenced from the root path of the app by default. This makes the path of the app bundle the same for both Blazor Server and Blazor WebAssembly projects."
    • "Component specific styles can also now use normal wwwroot-relative paths to refer to related assets, like images. We've updated Razor Class Library template to make use of component specific styles following this pattern."
  • Browser platform compatibility tooling: "The core framework libraries in .NET 5 have now been annotated to indicate which APIs are supported in browser scenarios. The platform compatibility analyzer uses this data to give appropriate warnings when using APIs from a Blazor WebAssembly app that are not supported when running in a browser on WebAssembly."
    Browser Platform Compatibility Tooling
    [Click on image for larger view.] Browser Platform Compatibility Tooling (source: Microsoft).

But wait, there's more, including cumulative Blazor improvements enacted up to this point including:

But, of course, ASP.NET Core isn't all about Blazor. Daniel Roth, principal program manager for ASP.NET, also listed cumulative improvements to:

  • MVC and Razor pages
  • Web API
  • SignalR
  • Kestrel
  • Authentication and authorization

See Roth's post for more details on all of the above and much more. Also available are .NET 5 release notes for more information, including closed ASP.NET Core issues.

About the Author

David Ramel is an editor and writer for Converge360.

comments powered by Disqus

Featured

  • AI for GitHub Collaboration? Maybe Not So Much

    No doubt GitHub Copilot has been a boon for developers, but AI might not be the best tool for collaboration, according to developers weighing in on a recent social media post from the GitHub team.

  • Visual Studio 2022 Getting VS Code 'Command Palette' Equivalent

    As any Visual Studio Code user knows, the editor's command palette is a powerful tool for getting things done quickly, without having to navigate through menus and dialogs. Now, we learn how an equivalent is coming for Microsoft's flagship Visual Studio IDE, invoked by the same familiar Ctrl+Shift+P keyboard shortcut.

  • .NET 9 Preview 3: 'I've Been Waiting 9 Years for This API!'

    Microsoft's third preview of .NET 9 sees a lot of minor tweaks and fixes with no earth-shaking new functionality, but little things can be important to individual developers.

  • Data Anomaly Detection Using a Neural Autoencoder with C#

    Dr. James McCaffrey of Microsoft Research tackles the process of examining a set of source data to find data items that are different in some way from the majority of the source items.

  • What's New for Python, Java in Visual Studio Code

    Microsoft announced March 2024 updates to its Python and Java extensions for Visual Studio Code, the open source-based, cross-platform code editor that has repeatedly been named the No. 1 tool in major development surveys.

Subscribe on YouTube