Versions of .NET

Release 3.0.0-preview7

  • Released on 2019-07-23
  • Runtime 3.0.0-preview7-27912-14
  • SDK 3.0.100-preview7-012821
  • ASP.NET Runtime 3.0.0-preview7.19365.7

SDK 3.0.100-preview7-012821

  • Visual Studio 2019 (v16.2. latest preview)
  • C# 8.0-preview
  • F# 4.7-preview

Release notes


.NET Core 3.0.0 Preview 7 - July 23, 2019

.NET Core 3.0.0 Preview 7 is available for download and usage in your environment. This release includes .NET Core 3.0.0 Preview 7 and .NET Core SDK 3.0.100 Preview 7.

Visual Studio compatibility: .NET Core 3.0 Preview 7 requires Visual Studio 2019 16.3 Preview 1, which will be released shortly. Visit Visual Studio Preview to learn about VS previews.

Blog Roundup

The .NET Core SDK 3.0.100 Preview 7 includes .NET Core 3.0 Runtime so downloading the runtime packages separately is not needed when installing the SDK. After installing the .NET Core SDK 3.0.100 preview, the following command will show that you're running version 3.0.100-preview7-012821 of the tools.

dotnet --version

Your feedback is important and appreciated. We've created an issue at dotnet/core #3075 for your questions and comments.


SDK Installer1 SDK Binaries1 Runtime Installer Runtime Binaries ASP.NET Core Runtime
Windows x86 | x64 x86 | x64 | ARM x86 | x64 x86 | x64 | ARM x86 | x64 | ARM |
Hosting Bundle2
macOS x64 x64 x64 x64 x641
Linux Snap Install x64 | ARM | ARM64 | x64 Alpine - x64 | ARM | ARM64 | x64 Alpine x641 | ARM1 | ARM641 | x64 Alpine1
RHEL6 - x64 - x64 -
Checksums SDK - Runtime - -
  1. Includes the .NET Core and ASP.NET Core Runtimes
  2. For hosting stand-alone apps on Windows Servers. Includes the ASP.NET Core Module for IIS and can be installed separately on servers without installing .NET Core runtime.


All symbols for .NET Core releases for all platforms are now available from nuget or public symbols server. The symbols zips files that we used to share in the release notes earlier will no longer be provided.

Docker Images

The .NET Core Docker images have been updated for this release. Details on our Docker versioning and how to work with the images can be seen in "Staying up-to-date with .NET Container Images".

The following repos have been updated

Notable Changes in 3.0.0 Preview 7

Here is list of some of the additions and updates we're excited to bring in Preview 7. See the .NET and ASP.NET Core blogs for additional details.

  • .NET Core SDK Size Improvements

  • SOS Update:

    SOS no longer ships as part of the .NET Core runtime. SOS now ships out of band and works with any version of the runtime. Instructions to install the new out of band SOS is available at

    The SOS source code and documentation has moved to the diagnostics repo here:

  • NetTrace replaces NetPerf format:

    The NetPerf format is obsolete and has now been replaced with NetTrace format which serves the identical role. The format is supported in Visual Studio 2019 starting with 16.3 Preview 1, TraceEvent version 2.0.43 and PerfView version 2.0.44.

    The most visible change is that trace files should be smaller than before. It is also faster to write, supports some new metadata on events, and makes some parsing scenarios more efficient. For more details see the file format spec.

  • CoreCLR: bugs | features

  • CoreFX: bugs | features

  • ASP.NET Core: bugs | features

Lifecycle News

Debian 10 has been released (GA) and will be supported by .NET Core 3.0 going forward.

As described in .NET Core OS Lifecycle Policy, we will no longer test .NET Core or produce updates for OS versions which are out of standard support or are end of life.