Artifacts for .NET 9 RC1 Release

README.md

@@ -8,11 +8,11 @@ Welcome to the home of .NET [release notes](./release-notes/README.md) and [news
 
 |  Version  | Release Date | Support | Latest Patch Version | End of Support |
 | :-- | :-- | :-- | :-- | :-- |
-| [.NET 9](release-notes/9.0/README.md) | November 12, 2024 | [STS][policies] | [9.0.0-preview.7][9.0.0-preview.7] | May 12, 2026 |
+| [.NET 9](release-notes/9.0/README.md) | November 12, 2024 | [STS][policies] | [9.0.0-rc.1][9.0.0-rc.1] | May 12, 2026 |
 | [.NET 8](release-notes/8.0/README.md) | [November 14, 2023](https://devblogs.microsoft.com/dotnet/announcing-dotnet-8/) | [LTS][policies] | [8.0.8][8.0.8] | November 10, 2026 |
 | [.NET 6](release-notes/6.0/README.md) | [November 8, 2021](https://devblogs.microsoft.com/dotnet/announcing-net-6/) | [LTS][policies] | [6.0.33][6.0.33]  | November 12, 2024 |
 
-[9.0.0-preview.7]: release-notes/9.0/preview/preview7/9.0.0-preview.7.md
+[9.0.0-rc.1]: release-notes/9.0/preview/rc1/9.0.0-rc.1.md
 [8.0.8]: release-notes/8.0/8.0.8/8.0.8.md
 [6.0.33]: release-notes/6.0/6.0.33/6.0.33.md
 [policies]: release-policies.md

release-notes/9.0/README.md

@@ -14,6 +14,7 @@
 
 | Date | Release |
 | :-- | :-- |
+| 2024/09/10 | [9.0.0 RC 1](preview/rc1/README.md) |
 | 2024/08/13 | [9.0.0 Preview 7](preview/preview7/README.md) |
 | 2024/07/09 | [9.0.0 Preview 6](preview/preview6/README.md) |
 | 2024/06/11 | [9.0.0 Preview 5](preview/preview5/README.md) |

release-notes/9.0/preview/rc1/README.md

@@ -0,0 +1,32 @@
+# .NET 9 RC 1 - Release Notes
+
+.NET 9 RC 1 released on September 10th, 2024. Find more information on new features released in .NET 9 RC 1 by browsing through the release notes below:
+
+* [Libraries](./libraries.md)
+* [SDK](./sdk.md)
+
+### Feature Release Notes
+
+* [.NET MAUI](./dotnetmaui.md)
+* [ASP.NET Core](./aspnetcore.md)
+
+## Get Started
+
+Instructions on getting started with .NET 9 can be found in the [getting started guide](../../get-started.md). Installers and binaries for .NET 9 RC 1 can be found [here on GitHub](./9.0.0-rc.1.md).
+
+## Announcements & Discussions
+
+Discuss this release with the product teams on GitHub through the announcements for this release. 
+
+* [.NET 9 RC 1 Announcement](https://aka.ms/dotnet/9/rc1)
+
+## Stay up-to-date
+
+You can find a detailed overview of all new features in .NET 9:
+
+* [What's new in .NET 9](https://learn.microsoft.com/dotnet/core/whats-new/dotnet-9/overview)
+* [What's new in ASP.NET Core](https://learn.microsoft.com/aspnet/core/release-notes/aspnetcore-9.0)
+* [What's new in .NET MAUI](https://learn.microsoft.com/dotnet/maui/whats-new/dotnet-9)
+* [What's new in EF Core](https://learn.microsoft.com/ef/core/what-is-new/ef-core-9.0/whatsnew)
+
+The latest .NET 9 release is always available at [dotnet.microsoft.com](https://dotnet.microsoft.com/download/dotnet/9.0) and [.NET 9 Releases](../../README.md).

release-notes/9.0/preview/rc1/aspnetcore.md

@@ -0,0 +1,125 @@
+# ASP.NET Core updates in .NET 9 Release Candidate 1
+
+Here's a summary of what's new in ASP.NET Core in this release:
+
+* [Improvements to SignalR distributed tracing](#improvements-to-signalr-distributed-tracing)
+* [Keep-alive timeout for WebSockets](#keep-alive-timeout-for-websockets)
+* [Keyed DI in middleware](#keyed-di-in-middleware)
+* [Override `InputNumber` type attribute](#override-inputnumber-type-attribute)
+* [Trust the ASP.NET Core HTTPS development certificate on Linux](#trust-the-aspnet-core-https-development-certificate-on-linux)
+
+ASP.NET Core updates in .NET 9 Release Candidate 1:
+
+* [Release notes](https://github.com/dotnet/core/blob/main/release-notes/9.0/preview/rc1/aspnetcore.md)
+* [What's new in ASP.NET Core in .NET 9](https://learn.microsoft.com/aspnet/core/release-notes/aspnetcore-9.0) documentation.
+* [Breaking changes](https://docs.microsoft.com/dotnet/core/compatibility/9.0#aspnet-core)
+* [Roadmap](https://aka.ms/aspnet/roadmap)
+
+.NET 9 Release Candidate 1:
+
+* [Discussion](https://aka.ms/dotnet/9/rc1)
+* [Release notes](https://github.com/dotnet/core/blob/main/release-notes/9.0/preview/rc1/README.md)
+
+## Improvements to SignalR distributed tracing
+
+.NET 9 preview 6 added [initial support for SignalR distributed tracing](https://github.com/dotnet/core/blob/main/release-notes/9.0/preview/preview6/aspnetcore.md#improved-distributed-tracing-for-signalr). RC1 improves SignalR tracing with new capabilities:
+
+* .NET SignalR client has an `ActivitySource` named "Microsoft.AspNetCore.SignalR.Client". Hub invocations now create a client span. Note that other SignalR clients, such as the JavaScript client, don't support tracing. This feature will be added to more clients in future releases.
+* Hub invocations from the client to the server now support [context propagation](https://opentelemetry.io/docs/concepts/context-propagation/). Propagating the trace context enables true distributed tracing. It's now possible to see invocations flow from the client to the server and back.
+
+Here's how these new activities look in the [.NET Aspire dashboard](https://learn.microsoft.com/dotnet/aspire/fundamentals/dashboard/overview?tabs=bash#standalone-mode):
+
+![SignalR distributed tracing](./media/signalr-distributed-tracing.png)
+
+## Keep-alive timeout for WebSockets
+
+The [WebSockets middleware](https://learn.microsoft.com/aspnet/core/fundamentals/websockets#configure-the-middleware) can now be configured with keep-alive timeouts.
+
+The keep-alive timeout aborts the WebSocket connection and throws an exception from `WebSocket.ReceiveAsync` if both of the following conditions are met:
+
+* The server sends a ping frame using the websocket protocol.
+* The client doesn't reply with a pong frame within the specified timeout.
+
+The server automatically sends the ping frame and configures it with `KeepAliveInterval`.
+
+The keep-alive timeout setting is useful for detecting connections that might be slow or ungracefully disconnected.
+
+The keep-alive timeout can be configured globally for the WebSocket middleware:
+
+```csharp
+app.UseWebSockets(new WebSocketOptions { KeepAliveTimeout = TimeSpan.FromSeconds(15) });
+```
+
+Or configured per accepted WebSocket:
+
+```csharp
+app.Run(async (context) =>
+{
+    using var webSocket = await context.WebSockets.AcceptWebSocketAsync(
+        new WebSocketAcceptContext { KeepAliveTimeout = TimeSpan.FromSeconds(15) });
+
+    // ...
+}
+```
+
+## Keyed DI in middleware
+
+Middleware now supports [Keyed DI](https://learn.microsoft.com/aspnet/core/fundamentals/dependency-injection#keyed-services) in both the constructor and the `Invoke`/`InvokeAsync` method.
+
+```csharp
+var builder = WebApplication.CreateBuilder(args);
+builder.Services.AddKeyedSingleton<MySingletonClass>("test");
+builder.Services.AddKeyedScoped<MyScopedClass>("test2");
+
+var app = builder.Build();
+app.UseMiddleware<MyMiddleware>();
+app.Run();
+
+internal class MyMiddleware
+{
+    private readonly RequestDelegate _next;
+
+    public MyMiddleware(RequestDelegate next, [FromKeyedServices("test")] MySingletonClass service)
+    {
+        _next = next;
+    }
+
+    public Task Invoke(HttpContext context, [FromKeyedServices("test2")] MyScopedClass scopedService) => _next(context);
+}
+```
+
+See [Write custom ASP.NET Core middleware](https://learn.microsoft.com/aspnet/core/fundamentals/middleware/write) for more information on writing custom middleware.
+
+Thank you [@NicoBrabers](https://github.com/NicoBrabers) for this contribution!
+
+## Override `InputNumber` type attribute
+
+The `InputNumber` component now supports overriding the type attribute. For example, you can specify `type="range"` to create a range input that supports model binding and form validation:
+
+```razor
+<InputNumber type="range" min="1" max="10" step="1" @bind-Value="Model.Rating" />
+```
+
+Thank you [@MattyLeslie](https://github.com/MattyLeslie) for the contribution!
+
+## Trust the ASP.NET Core HTTPS development certificate on Linux
+
+On Ubuntu and Fedora based Linux distros, `dotnet dev-certs https --trust` will now configure ASP.NET Core HTTPS development certificate as a trusted certificate for Chromium (Edge, Chrome, Chromium, etc) and Mozilla (Firefox, etc) browsers, as well as for use with .NET APIs (`HttpClient`, etc).  Previously, `--trust` only worked on Windows and macOS. Certificate trust is applied per-user.
+
+To establish trust in OpenSSL, the tool puts the certificate in *~/.aspnet/dev-certs/trust*, runs a simplified version of OpenSSL's c_rehash tool on the directory, and asks the user to update the `SSL_CERT_DIR` environment variable accordingly.
+
+To establish trust in dotnet, the tool puts the certificate in the *My/Root* certificate store.
+
+To establish trust in NSS databases (nssdb), the tool searches the home directory for Firefox profiles, *~/.pki/nssdb*, and *~/snap/chromium/current/.pki/nssdb*. For each one found, the tool adds an entry to the nssdb.
+
+## Community contributors
+
+Thank you contributors! ❤️
+
+* [@martincostello](https://github.com/dotnet/aspnetcore/pulls?q=is%3Apr+is%3Amerged+milestone%3A9.0-rc1+author%3Amartincostello)
+* [@NoahMoritz](https://github.com/dotnet/aspnetcore/pulls?q=is%3Apr+is%3Amerged+milestone%3A9.0-rc1+author%3ANoahMoritz)
+* [@ladeak](https://github.com/dotnet/aspnetcore/pulls?q=is%3Apr+is%3Amerged+milestone%3A9.0-rc1+author%3Aladeak)
+* [@voroninp](https://github.com/dotnet/aspnetcore/pulls?q=is%3Apr+is%3Amerged+milestone%3A9.0-rc1+author%3Avoroninp)
+* [@MauriceChocoSwiss](https://github.com/dotnet/aspnetcore/pulls?q=is%3Apr+is%3Amerged+milestone%3A9.0-rc1+author%3AMauriceChocoSwiss)
+* [@NicoBrabers](https://github.com/dotnet/aspnetcore/pulls?q=is%3Apr+is%3Amerged+milestone%3A9.0-rc1+author%3ANicoBrabers)
+* [@MattyLeslie](https://github.com/dotnet/aspnetcore/pulls?q=is%3Apr+is%3Amerged+milestone%3A9.0-rc1+author%3AMattyLeslie)

release-notes/9.0/preview/rc1/dotnetmaui.md

@@ -0,0 +1,47 @@
+# .NET MAUI updates in .NET 9 Release Candidate 1
+
+Here's a summary of what's new in .NET MAUI in this release:
+
+* [Added `HorizontalTextAlignment.Justify`](#added-horizontaltextalignmentjustify)
+
+.NET MAUI updates in .NET 9 Release Candidate 1:
+
+This release is focused on quality, housekeeping, and resolving issues to stabilize the impending GA release.
+
+* [Release notes](https://github.com/dotnet/core/blob/main/release-notes/9.0/preview/rc1/dotnetmaui.md)
+* [What's new in .NET MAUI in .NET 9](https://learn.microsoft.com/dotnet/maui/whats-new/dotnet-9) documentation.
+* [GitHub Release](https://aka.ms/maui9rc1)
+
+.NET 9 Release Candidate 1:
+
+* [Discussion](https://aka.ms/dotnet/9/rc1)
+* [Release notes](https://github.com/dotnet/core/blob/main/release-notes/9.0/preview/rc1/README.md)
+
+## Added `HorizontalTextAlignment.Justify`
+
+In addition to `Start`, `Center`, and `End` you can now use `Justify` to horizontally align your text in `Label`s.
+
+```xml
+<Label 
+  Text="Lorem ipsum dolor sit amet, consectetur adipiscing elit. In facilisis nulla eu felis fringilla vulputate. Nullam porta eleifend lacinia. Donec at iaculis tellus."
+  HorizontalTextAlignment="Justify"/>
+```
+
+![justify](./media/dotnetmaui-textalign-justify.png)
+
+## .NET for Android
+
+This release was focused on quality improvements.
+
+* [GitHub Release](https://github.com/xamarin/xamarin-android/releases/)
+
+## .NET for iOS
+
+This release was focused on quality improvements. Using this release requires the use of Xcode 15.4 for building apps.
+
+* [GitHub Release](https://github.com/xamarin/xamarin-macios/releases/)
+* [Known issues](https://github.com/xamarin/xamarin-macios/wiki/Known-issues-in-.NET9)
+
+## Community Contributions
+
+Thank you to our community contributors [@MartyIX](https://github.com/MartyIX), [@albyrock87](https://github.com/albyrock87), [@jpiechowiak](https://github.com/jpiechowiak), [@dhindrik](https://github.com/dhindrik), [@TommiGustafsson-HMP](https://github.com/TommiGustafsson-HMP), [@kubaflo](https://github.com/kubaflo), [@Tamilarasan-Paranthaman](https://github.com/Tamilarasan-Paranthaman), [@Vignesh-SF3580](https://github.com/Vignesh-SF3580), and [@daltzctr](https://github.com/daltzctr).