Windows 10: Announcing .NET Core 3.0 Preview 9

Brink · Sep 5, 2019

Today, we’re announcing .NET Core 3.0 Preview 9. Just like with Preview 8, we’ve focused on polishing .NET Core 3.0 for a final release and aren’t adding new features. If these final builds seem less exciting than earlier previews, that’s by design.

Download .NET Core 3.0 Preview 9 right now on Windows, macOS, and Linux.

ASP.NET Core, EF Core and Visual Studio are also releasing updates today.

Details:

.NET Core 3.0 release notes

API diff

GitHub release

.NET Core 3.0 is launching at .NET Conf

Tune in for .NET Conf, September 23-25th. We will launch .NET Core 3.0 during .NET Conf. Yes, that means that Preview 9 is the last preview, and .NET Core 3.0 will be released in its final version later this month. We have a lot of great speakers and content prepared for .NET Conf this year. It’s one of the big .NET developer events each year, and you cannot beat the price. It’s free and streaming online.

Visual Studio Support

.NET Core 3.0 is supported with Visual Studio 2019 16.3 Preview 3 and Visual Studio for Mac 8.3, which were also released today. Please upgrade to it for the best (and supported) experience with .NET Core 3.0 Preview 9. See Visual Studio 2019 16.3 release notes for more information.

We know that some folks have been successful using .NET Core 3.0 builds with Visual Studio 2019 16.2 and wonder why 16.3 is required. The short answer is that we only test .NET Core 3.0 with Visual Studio 2019 16.3 and have made many improvements and key fixes that are only in 16.3. The same model applies to Visual Studio for Mac 8.3.
The C# Extension for Visual Studio Code is always updated to support new .NET Core versions. Make sure you have the latest version of the C# extension installed.

Go Live

NET Core 3.0 Preview 9 is supported by Microsoft and can be used in production. We strongly recommend that you test your app running on Preview 9 before deploying into production. If you find an issue with .NET Core 3.0, please file a GitHub issue and/or contact Microsoft support.

The Microsoft .NET Site has been updated to .NET Core 3.0 Preview 9 (see the .NET Core runtime version in the footer text). It’s been running great on previews, starting with Preview 7, on Azure WebApps (as a self-contained app). Check out the Microsoft .NET site and see for yourself how it performs on Preview 9.

Closing

The .NET Core 3.0 release is coming close to completion, and the team is solely focused on stability and reliability now that we’re no longer building new features. Please tell us about any issues you find, ideally as quickly as possible. We want to get as many fixes in as possible before we ship the final 3.0 release.

If you missed earlier (more exciting) posts about .NET Core 3.0, check out the improvements that were part of .NET Core 3.0 Preview 6 (last preview with new features) and earlier releases.

If you install daily builds, read an important announcement about .NET Core master branches.

Richard Lander,
Program Manager, .NET Team
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Source: https://devblogs.microsoft.com/dotne...3-0-preview-9/

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Brink · Sep 5, 2019

Announcing .NET Core 3 Preview 2

.NET Core 3.0 Preview 2 is now available and it includes a bunch of new updates to ASP.NET Core.

Here's the list of what's new in this preview:

Razor Components

SignalR client-to-server streaming

Pipes on HttpContext

Generic host in templates

Endpoint routing updates

Get started

To get started with ASP.NET Core in .NET Core 3.0 Preview 2 install the .NET Core 3.0 Preview 2 SDK

If you're on Windows using Visual Studio, you'll also want to install the latest preview of Visual Studio 2019.

Upgrade an existing project

To upgrade an existing an ASP.NET Core app to .NET Core 3.0 Preview 2, follow the migrations steps in the ASP.NET Core docs.

Add package for Json.NET

As part of the work to tidy up the ASP.NET Core shared framework, Json.NET is being removed from the shared framework and now needs to be added as a package.

To add back Json.NET support to an ASP.NET Core 3.0 project:

Add a package reference to Microsoft.AspNetCore.Mvc.NewtonsoftJson

Update your ConfigureServices method to include a call to AddNewtonsoftJson().

services.AddMvc()
.AddNewtonsoftJson();

Runtime compilation removed

As a consequence of cleaning up the ASP.NET Core shared framework to not depend on Roslyn, support for runtime compilation of pages and views has also been removed in this preview release. Instead compilation of pages and views is performed at build time. In a future preview update we will provide a NuGet packages for optionally enabling runtime compilation support in an app.

Other breaking changes and announcements

For a full list of other breaking changes and announcements for this release please see the ASP.NET Core Announcements repo...
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Read more:

Announcing .NET Core 3 Preview 2 | .NET Blog

ASP.NET Core updates in .NET Core 3.0 Preview 2 | ASP.NET Blog

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Brink · Sep 5, 2019

Announcing .NET Core 2.2 Preview 3

Today, we are announcing .NET Core 2.2 Preview 3. We have made more improvements to the overall release that we would love to get your feedback on, either in the comments or at dotnet/core #2004.

ASP.NET Core 2.2 Preview 3 and Entity Framework 2.2 Preview 3 were also released today.

You can see more details of the release in the .NET Core 2.2 Preview 3 release notes. Related instructions, known issues, and workarounds are included in the releases notes. Please report any issues you find in the comments or at dotnet/core #2004.

Please see the .NET Core 2.2 Preview 2 post to learn more about the new features coming with .NET Core 2.2.
Thanks for everyone that contributed to .NET Core 2.2. You’ve helped make .NET Core a better product!

Download .NET Core 2.2

You can download and get started with .NET Core 2.2, on Windows, macOS, and Linux:

.NET Core 2.2 Preview 3 SDK (includes the runtime)

.NET Core 2.2 Preview 3 Runtime

Docker images are available at microsoft/dotnet for .NET Core and ASP.NET Core.

.NET Core 2.2 Preview 3 can be used with Visual Studio 15.9 Preview 3 (or later), Visual Studio for Mac and Visual Studio Code.

Platform Support

.NET Core 2.2 is supported on the following operating systems:

Windows Client: 7, 8.1, 10 (1607+)

Windows Server: 2008 R2 SP1+

macOS: 10.12+

RHEL: 6+

Fedora: 27+

Ubuntu: 14.04+

Debian: 8+

SLES: 12+

openSUSE: 42.3+

Alpine: 3.7+

Chip support follows:

x64 on Windows, macOS, and Linux

x86 on Windows

ARM32 on Linux (Ubuntu 18.04+, Debian 9+)

Closing

Please download and test .NET Core 2.2 Preview 3. We’re looking for feedback on the release with the intent of shipping the final version later this year.
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Source: Announcing .NET Core 2.2 Preview 3 | .NET Blog

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Brink · Sep 5, 2019

Announcing .NET Core 3 Preview 4

Today, we are announcing .NET Core 3.0 Preview 4. It includes a chart control for Windows Forms, HTTP/2 support, GC updates to use less memory, support for CPU limits with Docker, the addition of PowerShell in .NET Core SDK Docker container images, and other improvements. If you missed it, check out the improvements we released in .NET Core 3.0 Preview 3 just last month.

Download .NET Core 3 Preview 4 right now on Windows, macOS and Linux.

ASP.NET Core and Entity Framework Core updates are also being released today.
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Read more: Announcing .NET Core 3 Preview 4 | .NET Blog

Windows 10: Announcing .NET Core 3.0 Preview 9

Announcing .NET Core 3.0 Preview 9

Announcing .NET Core 3.0 Preview 9

Announcing .NET Core 3.0 Preview 9

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