dotnet-core/release-notes/3.0/preview/3.0.0-preview2.md

# .NET Core 3.0.0 Preview 2 - January 29, 2019

.NET Core 3.0.0 Preview 2 is available for download and usage in your environment. This release includes .NET Core 3.0.0 Preview 2 and .NET Core SDK 3.0.100 Preview 2.

If Visual Studio is your preferred environment, you will need Visual Studio 2019 Preview 2 to take full advantage of the .NET Core 3.0 Preview.

* [Downloads](#downloads)
* [Changes in this release](#notable-changes-in-300-preview-2)

## Blog Round up

* [.NET][dotnet-blog]
* [ASP.NET Core](https://blogs.msdn.microsoft.com/webdev/2019/01/29/aspnet-core-3-preview-2/)

The .NET Core SDK 3.0.100 Preview 2 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-preview-010184` of the tools.

If you use Visual Studio for development work, Visual Studio 2019 is required.

`dotnet --version`

Your feedback is important and appreciated. We've created an issue at [dotnet/core #2263](https://github.com/dotnet/core/issues/2263) for your questions and comments.

## Downloads

|           | SDK Installer<sup>1</sup>                        | SDK Binaries<sup>1</sup>                 | Runtime Installer                                        | Runtime Binaries                                 | ASP.NET Core Runtime           |
| --------- | :------------------------------------------:     | :----------------------:                 | :---------------------------:                            | :-------------------------:                      | :-----------------:            |
| Windows   | [x86][dotnet-sdk-win-x86.exe] \| [x64][dotnet-sdk-win-x64.exe] | [x86][dotnet-sdk-win-x86.zip] \| [x64][dotnet-sdk-win-x64.zip] \| [ARM][dotnet-sdk-win-arm.zip] | [x86][dotnet-runtime-win-x86.exe] \| [x64][dotnet-runtime-win-x64.exe] | [x86][dotnet-runtime-win-x86.zip] \| [x64][dotnet-runtime-win-x64.zip] \| [ARM][dotnet-runtime-win-arm.zip] \| [ARM64][dotnet-runtime-win-arm64.zip] | [x86][aspnetcore-runtime-win-x86.exe] \| [x64][aspnetcore-runtime-win-x64.exe] \| [ARM][aspnetcore-runtime-win-arm.zip] <br> [Hosting Bundle][dotnet-hosting-win.exe]<sup>2</sup> |
| macOS     | [x64][dotnet-sdk-osx-x64.pkg]  | [x64][dotnet-sdk-osx-x64.tar.gz]     | [x64][dotnet-runtime-osx-x64.pkg] | [x64][dotnet-runtime-osx-x64.tar.gz] | [x64][aspnetcore-runtime-osx-x64.tar.gz]<sup>1</sup>
| Linux     |  [Snap install](3.0.0-preview2-download.md)  | [x64][dotnet-sdk-linux-x64.tar.gz] \| [ARM][dotnet-sdk-linux-arm.tar.gz] \| [ARM64][dotnet-sdk-linux-arm64.tar.gz] \| [x64 Alpine][dotnet-sdk-linux-musl-x64.tar.gz] | - | [x64][dotnet-runtime-linux-x64.tar.gz] \| [ARM][dotnet-runtime-linux-arm.tar.gz] \| [ARM64][dotnet-runtime-linux-arm64.tar.gz] \| [x64 Alpine][dotnet-runtime-linux-musl-x64.tar.gz] | [x64][aspnetcore-runtime-linux-x64.tar.gz]<sup>1</sup>  \| [ARM][aspnetcore-runtime-linux-arm.tar.gz]<sup>1</sup> \| [ARM64][aspnetcore-runtime-linux-arm64.tar.gz]<sup>1</sup> \| [x64 Alpine][aspnetcore-runtime-linux-musl-x64.tar.gz]<sup>1</sup> |
| RHEL6     | -                                                | [x64][dotnet-sdk-rhel.6-x64.tar.gz]                    | -                                                        | [x64][dotnet-runtime-rhel.6-x64.tar.gz] | - |
| Checksums | [SDK][checksums-sdk]                             | -                                        | [Runtime][checksums-runtime]                             | - | - |
| Symbols   | - | -                                        | [Runtime][coreclr-symbols.zip] \| [Shared Framework][corefx-symbols.zip] \| [Setup][core-setup-symbols.zip] | - | [ASP.NET Core][aspnet-symbols.zip] |

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.

## Notable Changes in 3.0.0 Preview 2

* ASP.NET Core 3.0 Preview 2
* EF Core 3.0 Preview 2
* C# 8 Preview 2 ([see highlights in the blog post][dotnet-blog])
* .NET Platform Dependent Intrinsics
* JSON Writer and JSON Document
* Local dotnet tool improvements
* Assembly Unloadability
* Windows native interop
* Work continues on WinForms and WPF
* [API changes for Preview 2](https://github.com/dotnet/core/blob/master/release-notes/3.0/preview/api-diff/preview2/3.0-preview2.md)

## Docker Images

The [.NET Core Docker images](https://hub.docker.com/r/microsoft/dotnet/) 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"](https://blogs.msdn.microsoft.com/dotnet/2018/06/18/staying-up-to-date-with-net-container-images/).

The following repos have been updated

* [microsoft/dotnet](https://hub.docker.com/r/microsoft/dotnet)
* [microsoft/dotnet-samples](https://hub.docker.com/r/microsoft/dotnet-samples)

[blob-runtime]: https://dotnetcli.blob.core.windows.net/dotnet/Runtime/
[blob-sdk]: https://dotnetcli.blob.core.windows.net/dotnet/Sdk/
[release-notes]: https://github.com/dotnet/core/blob/master/release-notes/3.0/preview/3.0.0-preview2.md

[dotnet-runtime-linux-arm.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/c91ed181-87b5-455f-ace8-7c288fd27a02/5eca93bead02f2b6d2bd5e3968a8f997/dotnet-runtime-3.0.0-preview-27324-5-linux-arm.tar.gz
[dotnet-runtime-linux-arm64.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/54f8a5fa-37a6-4bd1-be00-e92d428ba9fc/6d87634846e580d563daee8df761ca50/dotnet-runtime-3.0.0-preview-27324-5-linux-arm64.tar.gz
[dotnet-runtime-linux-musl-x64.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/4ea98538-3144-4c3e-aaba-f9b6d37d85c5/17b867d5fb4dfd753b2ecabe40762a51/dotnet-runtime-3.0.0-preview-27324-5-linux-musl-x64.tar.gz
[dotnet-runtime-linux-x64.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/f29a6be7-72a1-493c-a047-f01c93e67b15/c40ce83a8f85432d4c8a019ea5a7a34f/dotnet-runtime-3.0.0-preview-27324-5-linux-x64.tar.gz
[dotnet-runtime-osx-x64.pkg]: https://download.visualstudio.microsoft.com/download/pr/5aa8af44-d469-4556-a2ff-41f5c275a7b4/8ffaf6c431aea9a0f1daf02760d1efff/dotnet-runtime-3.0.0-preview-27324-5-osx-x64.pkg
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[dotnet-runtime-win-arm.zip]: https://download.visualstudio.microsoft.com/download/pr/6004c6c3-015e-4900-bb45-b6ad79b05238/74fe4419b74a40895fc88eb27fa413b3/dotnet-runtime-3.0.0-preview-27324-5-win-arm.zip
[dotnet-runtime-win-arm64.zip]: https://download.visualstudio.microsoft.com/download/pr/a764f239-ea5f-436a-a3b0-cecc955cc0ab/67e8f1848e7469c029a0704eb8cc77b0/dotnet-runtime-3.0.0-preview-27324-5-win-arm64.zip
[dotnet-runtime-win-x64.exe]: https://download.visualstudio.microsoft.com/download/pr/30594a10-9dcf-44c9-88c2-c559da2a0c6e/7cb211623fefc681750632dc6e5b3b36/dotnet-runtime-3.0.0-preview-27324-5-win-x64.exe
[dotnet-runtime-win-x64.zip]: https://download.visualstudio.microsoft.com/download/pr/1abbe748-2565-422b-aae9-e127a138c2fb/ae4ddb0d6820f9f32374d85b352646dd/dotnet-runtime-3.0.0-preview-27324-5-win-x64.zip
[dotnet-runtime-win-x86.exe]: https://download.visualstudio.microsoft.com/download/pr/a124f110-426e-47e5-bc3a-6e7452a878ff/54c7fbd2df2e976b832eb317f7b49767/dotnet-runtime-3.0.0-preview-27324-5-win-x86.exe
[dotnet-runtime-win-x86.zip]: https://download.visualstudio.microsoft.com/download/pr/3d12d669-d0ec-47e5-abdf-7a836280510b/78f592341859c071ab92ce893f5be66b/dotnet-runtime-3.0.0-preview-27324-5-win-x86.zip

[aspnetcore-runtime-linux-arm.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/c83595cd-7f49-484d-89cf-3dfffc1cca15/de670466aeeb953b5487d44039e65ca7/aspnetcore-runtime-3.0.0-preview-19075-0444-linux-arm.tar.gz
[aspnetcore-runtime-linux-arm64.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/b3ccac0c-16f8-4574-8ed4-1bb8c1bd1bbd/a6611d9400eff28e507bd0e213c0aeb1/aspnetcore-runtime-3.0.0-preview-19075-0444-linux-arm64.tar.gz
[aspnetcore-runtime-linux-musl-x64.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/2f85d75a-5a3f-4f3e-a30b-8ba033b61ee6/16f3a28b8da98d6a8cedf9e333ada502/aspnetcore-runtime-3.0.0-preview-19075-0444-linux-musl-x64.tar.gz
[aspnetcore-runtime-linux-x64.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/8123f592-5157-439f-9db6-3e20d34b903d/83e9abdd3a7dbf9d1900d754c5fab7d8/aspnetcore-runtime-3.0.0-preview-19075-0444-linux-x64.tar.gz
[aspnetcore-runtime-osx-x64.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/8fa5bf65-5d96-478b-ab47-f05498d19817/fb3c9f3d301734ed9ef86bc3b03c7691/aspnetcore-runtime-3.0.0-preview-19075-0444-osx-x64.tar.gz
[aspnetcore-runtime-win-arm.zip]: https://download.visualstudio.microsoft.com/download/pr/8e32cd17-59fe-4865-a675-80040c9a6434/fff561380a16769312717f1c7caa8ec5/aspnetcore-runtime-3.0.0-preview-19075-0444-win-arm.zip
[aspnetcore-runtime-win-x64.exe]: https://download.visualstudio.microsoft.com/download/pr/06089a79-846b-462f-bf50-71046c046741/b6c1eeea8fbe210af11261f3d7b40f25/aspnetcore-runtime-3.0.0-preview-19075-0444-win-x64.exe
[aspnetcore-runtime-win-x64.zip]: https://download.visualstudio.microsoft.com/download/pr/f6553777-48be-46b2-8588-708e5585e6d7/06bab8faa0bb1e413a0cb0c73eaf7eea/aspnetcore-runtime-3.0.0-preview-19075-0444-win-x64.zip
[aspnetcore-runtime-win-x86.exe]: https://download.visualstudio.microsoft.com/download/pr/5fe8dd95-5649-4c05-9dd2-a79c692007d1/adca517a835200b3253fa337229cf415/aspnetcore-runtime-3.0.0-preview-19075-0444-win-x86.exe
[aspnetcore-runtime-win-x86.zip]: https://download.visualstudio.microsoft.com/download/pr/d252ee01-b95d-476e-93db-ac01d81ee0c2/9465056dad090c55a2d19708162eb55b/aspnetcore-runtime-3.0.0-preview-19075-0444-win-x86.zip
[dotnet-hosting-win.exe]: https://download.visualstudio.microsoft.com/download/pr/1f4548a4-96a4-4905-b222-1115d0f30535/a7eaa7c6565c2273991e0f3ca4c790c9/dotnet-hosting-3.0.0-preview-19075-0444-win.exe

[dotnet-sdk-linux-arm.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/83bca990-9618-46d8-b096-32ecdf3ae492/c2f9d2785e78f20de0c3bb2adb880c5e/dotnet-sdk-3.0.100-preview-010184-linux-arm.tar.gz
[dotnet-sdk-linux-arm64.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/716a5791-eca8-4b65-b1bd-6a9852327b00/4cb3c2c89e2428bebcdb7193eaa45b91/dotnet-sdk-3.0.100-preview-010184-linux-arm64.tar.gz
[dotnet-sdk-linux-musl-x64.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/3e28fec3-fd16-4fb3-8eaf-bb7351ab210c/50b758004c5c307fa048b7ef41fa47d2/dotnet-sdk-3.0.100-preview-010184-linux-musl-x64.tar.gz
[dotnet-sdk-linux-x64.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/efa6dde9-a5ee-4322-b13c-a2a02d3980f0/dad445eba341c1d806bae5c8afb47015/dotnet-sdk-3.0.100-preview-010184-linux-x64.tar.gz
[dotnet-sdk-osx-x64.pkg]: https://download.visualstudio.microsoft.com/download/pr/9748ef38-c39d-421c-85ba-87cb594f39d7/44971a83ac21284c39927cba8d747d99/dotnet-sdk-3.0.100-preview-010184-osx-x64.pkg
[dotnet-sdk-osx-x64.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/e1cff8a8-9c60-4818-92c4-ac2ebe8fc47f/cce8dd19438ac62ff52d80fab7a61093/dotnet-sdk-3.0.100-preview-010184-osx-x64.tar.gz
[dotnet-sdk-rhel.6-x64.tar.gz]: https://download.visualstudio.microsoft.com/download/pr/96b5fd54-7c90-4b83-ac12-9015093ba1b7/d7684cc81cfab9fc10d2b51b6c11a9d9/dotnet-sdk-3.0.100-preview-010184-rhel.6-x64.tar.gz
[dotnet-sdk-win-arm.zip]: https://download.visualstudio.microsoft.com/download/pr/ad976dfc-09d8-429b-9c49-48626898b1bf/680250d6940b02dd7a392321afec9aa6/dotnet-sdk-3.0.100-preview-010184-win-arm.zip
[dotnet-sdk-win-x64.exe]: https://download.visualstudio.microsoft.com/download/pr/a7e73d05-4e75-4543-ac41-fc69d2f617e5/3f65a44f90c9df66664b44e86b0e6d29/dotnet-sdk-3.0.100-preview-010184-win-x64.exe
[dotnet-sdk-win-x64.zip]: https://download.visualstudio.microsoft.com/download/pr/918c5936-1c58-4a6a-b738-0a9766ec6192/4f17576e7efe45c447a088adda08b2f9/dotnet-sdk-3.0.100-preview-010184-win-x64.zip
[dotnet-sdk-win-x86.exe]: https://download.visualstudio.microsoft.com/download/pr/49471fc3-4a86-4f2d-bfe9-b26f8681a728/73a0afdc0bc45fc52b9f182efb6310ed/dotnet-sdk-3.0.100-preview-010184-win-x86.exe
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[aspnet-symbols.zip]: https://download.visualstudio.microsoft.com/download/pr/3bb56825-2b32-4abb-9052-040a276d16d1/a059da55e95a6f516b433c97de17ad56/aspnet-3.0.0-preview2-symbols.zip
[core-setup-symbols.zip]: https://download.visualstudio.microsoft.com/download/pr/6eacf7dc-e302-487d-956e-86277f630491/30fa1ae51bb033a8f58391612112567f/core-setup-3.0.0-preview2-symbols.zip
[coreclr-symbols.zip]: https://download.visualstudio.microsoft.com/download/pr/9b361fc7-c3fc-4964-b1e7-9826d2f3778e/036f50690dca77182353bd78474c0ffe/coreclr-3.0.0-preview2-symbols.zip
[corefx-symbols.zip]: https://download.visualstudio.microsoft.com/download/pr/1a50a636-b56f-48ed-a5ab-7cdf8c85914e/d89d8d15227621c495b7eebfea54d3b5/corefx-3.0.0-preveiw2-symbols.zip

[checksums-runtime]: https://dotnetcli.blob.core.windows.net/dotnet/checksums/3.0.0-preview-27324-5-runtime-sha.txt
[checksums-sdk]: https://dotnetcli.blob.core.windows.net/dotnet/checksums/3.0.100-preview-010184-sdk-sha.txt

[linux-install]: https://www.microsoft.com/net/download/linux
[linux-setup]: https://github.com/dotnet/core/blob/master/Documentation/linux-setup.md

[dotnet-blog]: https://blogs.msdn.microsoft.com/dotnet/2019/01/29/announcing-net-core-3-preview-2/