Today, we are releasing the .NET April 2021 Updates. These updates contains reliability and other non-security improvements. See the individual release notes for details on updated packages.

You can download 5.0.5 versions for Windows, macOS, and Linux, for x86, x64, Arm32, and Arm64.

• Installers and binaries: 5.0.5
• Release notes: 5.0.5
• Container images
• Linux packages: 5.0.5
• Release feedback/issues
• Known issues: 5.0  

We’re proud to announce the release of PowerShell 7.1, the latest major update to PowerShell 7. This release includes a number of improvements and fixes that build on top of the PowerShell 7.0 release in March and the recent GA release of .NET 5.  

The C# language itself has changed little in version 6, the main importance of the release being the introduction of the Roslyn .NET Compiler Platform. However the New features and improvements that have been made to C# are welcome because they are aimed at aiding productivity. Paulo Morgado explains what they are, and how to use them. 

Well perhaps the first thing to say is that Windows Desktop apps will still work on Windows 10 without any changes. You can even make use of the new Window 10 APIs in a Win32 application and there are improvements in .NET 4.6. Even WPF receives some attention

What’s new?

Here’s a sampling of the great new features and improvements in ASP.NET Core for .NET 7:

• Servers and runtime
  • Rating limiting: Limit the rate of handled requests using flexible endpoint configuration and policies.
  • Output caching: Configure output caching to reduce to more efficiently handle request.
  • Request decompression: Accept requests with compressed content.
  • HTTP/3: Built-in support for HTTP/3, the latest HTTP version based on the new QUIC multiplexed transport protocol.
  • WebSockets over HTTP/2: Use WebSockets over HTTP/2 connections.
  • WebTransport (experimental): Create streams and data grams over HTTP/3 with experimental support for WebTransport.
• Minimal APIs
  • Endpoint filters: Use endpoint filters to run cross-cutting code before or after a route handler.
  • Typed results: Return strongly typed results from minimal APIs.
  • Route groups: Organize groups of endpoints with a common prefix
• gRPC
  • JSON transcoding: Expand the reach of your gRPC services by also exposing them as JSON-based APIs
  • OpenAPI with JSON transcoding (experimenal): Use experimental support for generating OpenAPI specs for your gRPC JSON transcoded services.
  • gRPC health checks: Report and check the health of gRPC server apps.
  • gRPC client AddCallCredentials : Create clients that send authorized requests using bearer tokens.
• SignalR
  • Client results: Return client results to the server in response to requests from the server.
• MVC
  • Nullable view and page models: Nullable page and view models are now supported to improve the experience when using null state checking.
• Blazor
  • Custom elements: Build standard HTML custom elements with Blazor to integrate Blazor components with any JavaScript-based app.
  • Handle location changing events: Intercept location changing events to create custom user experiences when navigating.
  • Bind after/get/set modifiers: Run async logic after data binding and independently control how data binding gets and sets the data.
  • Dynamic authentication requests: Create dynamic authentication requests at runtime with custom parameters to handle advanced authentication scenarios in Blazor WebAssembly apps.
  • Improved JavaScript interop on WebAssembly: Optimize JavaScript interop call when running on WebAssembly using the new [JSImport]/[JSExport] support.
  • WebAssembly SIMD & exception handling: Improve performance with .NET WebAssembly ahead-of-time (AOT) compilation using WebAssembly SIMD and exception handling support. 

The ASP.NET team is proud to announce general availability of ASP.NET Core 2.0.  This release features compatibility with .NET Core 2.0, tooling support in Visual Studio 2017 version 15.3, and the new Razor Pages user-interface design paradigm.  For a full list of updates, you can read the release notes.  The latest SDK and tools can be downloaded from https://dot.net/core. Read the .NET Core 2.0 release announcement for more information and watch the launch video on Channel 9.

زمانی که از CSharp و به صورت کلی NET. استفاده می‌کنیم تا برای Android-iOS-Windows و جدیدا Web برنامه بنویسیم، این دغدغه ای که گفتید پیش میآد. علاوه بر راه هایی مثل Obfuscation که همیشه امکان استفاده شون هست، شما راه حل بهتری هم دارید و اون تبدیل کدتون به Native machine code هست که عملا مشکلی که گفتید رو نخواهد داشت و Performance خیلی خیلی خیلی بهتری هم می‌ده. توی Android و iOS این قابلیت در Xamarin دیده شده که اول Native Machine Code با قابلیتی به نام AOT یا Ahead of time به دست بیاد و یک دور هم با LLVM یا Low Level Virtual Machine بهینه سازی هم بشه. اون چیزی که شما به مشتری می‌دید دیگه DLL نیست و به هیچ روی چیز قابل فهمی هم داخل اش نیست. در برنامه‌های UWP می‌تونید از Dot Net Native استفاده کنید. در برنامه‌های WPF می‌تونید با پشتیبانی 3 NET Core. از اون، بیایید و خروجی کاملا Windows ای بگیرید که هم احتیاج به نصب بودن Dot Net یا Dot Net Core نداره و هم کدش خوانا نیست. توی Web Assembly هم همین هست، با پشتیبانی Mono از AOT که در مراحل اولیه قرار داره می‌تونید به سمت مرورگر فایل wasm بفرستید، نه dll، هم مشکلی که گفتید رو نداره و هم تا 70 برابر بسته به سناریو سرعت بیشتری داره.

Porting existing code to .NET Core used to be quite hard because the available API set was very small. In .NET Core 2.0, we already made this much easier, thanks to .NET Standard 2.0. Today, we’re happy to announce that we made it even easier with the Windows Compatibility Pack, which provides access to an additional 20,000 APIs via a single NuGet package. 

What's New in Blazor for .NET 8
Come find out about the future of Blazor in .NET 8! We'll explore all the upcoming features and improvements, including our effort to create a unified full stack web UI programming model that combines the strengths of client and server. We hope to see you there!

You will learn:
How Blazor is becoming the best option for full stack web development
How Blazor in .NET 8 will provide full flexibility to build web apps however works best for you
How to try out the latest Blazor features in .NET 8