Windows 10: Announcing .NET Core 3.0 Release Candidate 1

Brink · Sep 24, 2019

Today, we’re announcing .NET Core 3.0 Release Candidate 1. Just like with Preview 9, we’ve focused on polishing .NET Core 3.0 for a final release. We are now getting very, very close. We intend to release the final version on September 23 at .NET Conf.

Download .NET Core 3.0 RC1 on Windows, macOS, and Linux, available now.

Details:

ASP.NET Core 3.0 RC1

Entity Framework

Release notes

API Diff

GitHub issue

GitHub release

Why RC1?

The .NET Core 3.0 Preview 9 post stated that Preview 9 would be the last release before the final GA one. We, or at least the tireless writer of these blog posts, were mistaken. And now for the explanation.

For technical and historical reasons, the .NET toolset (compilers, NuGet client, MSBuild, …) is duplicated between Visual Studio and the .NET Core SDK. Important changes were made in the toolset as part of Visual Studio 2019 16.3 Preview 4, also released today. It is critical that the .NET Core SDK version that is part of any Visual Studio release includes the same toolset in order to deliver a compatible experience in all scenarios.

We should have realized that there was a high likelihood that we might need to release changes to accomodate another Visual Studio preview. Making fixes in the .NET toolset like this is standard operating procedure. We could have released a new .NET Core SDK and only delivered it via Visual Studio, however, we’ve broken people in the (now distant) past with that approach. As a result, when we release a new .NET Core SDK, we make it available for everyone in all the places.

Visual Studio Support

.NET Core 3.0 is supported with Visual Studio 2019 16.3 Preview 4 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 RC1. See Visual Studio 2019 16.3 release notes for more information.

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 RC1 is supported by Microsoft and can be used in production. We strongly recommend that you test your app running on Preview RC1 before deploying into production. If you find an issue with .NET Core 3.0, please file a GitHub issue and/or contact Microsoft support.

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.

Richard Lander,
Program Manager, .NET Team
Click to expand...

Source: https://devblogs.microsoft.com/dotne...e-candidate-1/

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Brink · Sep 24, 2019

Announcing .NET Core 3.0 Release Candidate 1

Today, we’re announcing .NET Core 3.0 Release Candidate 1. Just like with Preview 9, we’ve focused on polishing .NET Core 3.0 for a final release. We are now getting very, very close. We intend to release the final version on September 23 at .NET Conf.

Download .NET Core 3.0 RC1 on Windows, macOS, and Linux, available now.

Details:

ASP.NET Core 3.0 RC1

Entity Framework

Release notes

API Diff

GitHub issue

GitHub release

Why RC1?

The .NET Core 3.0 Preview 9 post stated that Preview 9 would be the last release before the final GA one. We, or at least the tireless writer of these blog posts, were mistaken. And now for the explanation.

For technical and historical reasons, the .NET toolset (compilers, NuGet client, MSBuild, …) is duplicated between Visual Studio and the .NET Core SDK. Important changes were made in the toolset as part of Visual Studio 2019 16.3 Preview 4, also released today. It is critical that the .NET Core SDK version that is part of any Visual Studio release includes the same toolset in order to deliver a compatible experience in all scenarios.

We should have realized that there was a high likelihood that we might need to release changes to accomodate another Visual Studio preview. Making fixes in the .NET toolset like this is standard operating procedure. We could have released a new .NET Core SDK and only delivered it via Visual Studio, however, we’ve broken people in the (now distant) past with that approach. As a result, when we release a new .NET Core SDK, we make it available for everyone in all the places.

Visual Studio Support

.NET Core 3.0 is supported with Visual Studio 2019 16.3 Preview 4 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 RC1. See Visual Studio 2019 16.3 release notes for more information.

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 RC1 is supported by Microsoft and can be used in production. We strongly recommend that you test your app running on Preview RC1 before deploying into production. If you find an issue with .NET Core 3.0, please file a GitHub issue and/or contact Microsoft support.

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.

Richard Lander,
Program Manager, .NET Team
Click to expand...

Source: https://devblogs.microsoft.com/dotne...e-candidate-1/

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Brink · Sep 24, 2019

Announcing .NET Core 3 Preview 3

Today, we are announcing .NET Core 3.0 Preview 3. We would like to update you on the .NET Core 3.0 schedule and introduce you to improvements in .NET Core SDK installers, Docker containers, Range, and Index. We also have updates on the Windows Desktop and Entity Framework projects.

Download and get started with .NET Core 3 Preview 3 right now on Windows, macOS and Linux.

You can see complete details of the release in the .NET Core 3 Preview 3 release notes.

.NET Core 3.0 will be supported in Visual Studio 2019, Visual Studio for Mac and Visual Studio Code. A new C# extension update (install VSIX) has been produced with the latest C# compiler (aligned with .NET Core Preview 3 and Visual Studio 2019 Preview 4).

We recently published an update on Floating-Point Parsing and Formatting improvements in .NET Core 3.0. Please check out that post in you use floating APIs and associated mathematical operations.

Schedule

We have seen people asking questions about when .NET Core 3.0 will be released. They also want to know if .NET Core 3.0 will be included in Visual Studio 2019. Visual Studio 2019 RC was recently released, which is part of the motivation for the questions.

We plan to ship .NET Core 3.0 in the second half of 2019. We will announce the ship date at the Build 2019 conference.

Visual Studio 2019 will be released on April 2nd. .NET Core 2.1 and 2.2 will be included in that release, just like they have been in the Visual Studio 2019 preview builds. At the point of the final .NET Core 3.0 release, we’ll announce support for a specific Visual Studio 2019 update, and .NET Core 3.0 will be included in Visual Studio 2019 from that point on.

We’re tracking to shipping .NET Core 3.0 preview releases every month. By coincidence,the previews now align with the months. We’re releasing Preview 3 today and we’re in the third month. We hope to continue that pattern until the final release.

.NET Core SDK installers will now Upgrade in Place

For Windows, the .NET Core SDK MSI installers will start upgrading patch versions in place. This will reduce the number of SDKs that are installed on both developer and production machines.

The upgrade policy will specifically target .NET Core SDK feature bands. Feature bands are defined in hundreds groups in the patch section of the version number. For example, 3.0.101 and 3.0.201 are versions in two different feature bands while 3.0.101 and 3.0.199 are in the same feature band.

This means when .NET Core SDK 3.0.101 becomes available and is installed, .NET Core SDK 3.0.100 will be removed from the machine if it exists. When .NET Core SDK 3.0.200 becomes available and is installed on the same machine, .NET Core SDK 3.0.101 will not be removed. In that situation, .NET Core SDK 3.0.200 will still be used by default, but .NET Core SDK 3.0.101 (or higher .1xx versions) will still be usable if it is configured for use via global.json.

This approach aligns with the behavior of global.json, which allows roll forward across patch versions, but not feature bands of the SDK. Thus, upgrading via the SDK installer will not result in errors due to a missing SDK. Feature bands also align with side by side Visual Studio installations for those users that install SDKs for Visual Studio use.

We would like feedback on the approach we’ve taken for upgrading the .NET Core SDK in place. We considered a few different policies and chose this one because it is the most conservative. We’d also like to hear if it is important to build similar experience on macOS. For Linux, we use package managers, which have an existing upgrade-in-place behavior.

For more information, please check out:

.NET Core versioning

Remove .NET Core SDK versions

Click to expand...

Read more:

.NET Blog | Announcing .NET Core 3 Preview 3

ASP.NET Blog | ASP.NET Core updates in .NET Core 3.0 Preview 3

Brink · Sep 24, 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...
Click to expand...

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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Windows 10: Announcing .NET Core 3.0 Release Candidate 1

Announcing .NET Core 3.0 Release Candidate 1

Announcing .NET Core 3.0 Release Candidate 1

Announcing .NET Core 3.0 Release Candidate 1

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