Microsoft Launches .NET 9 Preview 1 – Download Now

Download NET 9Download NET 9

Following in the footsteps of .NET 8, Microsoft has released the first-ever preview version of .NET 9. In their announcement, Microsoft aims toward two principal focal points: Cloud-native and intelligent app development with AI integration. Of course, it also observes improvements and performance gains in other areas, like security, productivity, and ease of use for the developers.

This is what the .NET team has to say about .NET 9 Preview 1:

Our goal is to make .NET development more productive using Visual Studio, Visual Studio Code with the C# Dev Kit, and cloud deployments easier using Azure services.

Download .NET 9 Preview 1

Use the direct download links below to download the .NET 9 Preview 1 Runtime, SDKs, and ASP.NET Core matching your operating system and architecture. Simply click on the respective link in the “Download” column to begin the download.

Runtime

VersionPlatformDownload
.NET 9 Preview 1 Desktop RuntimeWindowsx64
x86
ARM64
.NET 9 Preview 1 RuntimeWindowsx64
x86
ARM64
.NET 9 Preview 1 RuntimemacOSx64
ARM64
.NET 9 Preview 1 Runtime BinariesLinuxx64
ARM32
ARM64
.NET 9 Preview 1 Runtime BinariesLinux Alpinex64
ARM32
ARM64
Download .NET 9 Preview 1 Runtimes

SDK

VersionPlatformDownload
.NET 9.0.100 SDKWindowsx64
x86
ARM64
.NET 9.0.100 SDKmacOSx64
ARM64
.NET 9.0.100 SDK BinariesLinuxx64
ARM32
ARM64
.NET 9.0.100 SDK BinariesLinux Alpinex64
ARM32
ARM64
Download .NET 9 Preview 1 SDKs

ASP.NET Core

VersionPlatformDownload
.NET 9 Preview 1 ASP.NET Core RuntimeWindowsHosting bundle
x64
x86
ARM64 (Binaries)
.NET 9 Preview 1 ASP.NET Core Runtime BinariesmacOSx64
ARM64
.NET 9 Preview 1 ASP.NET Core Runtime BinariesLinuxx64
ARM32
ARM64
.NET 9 Preview 1 ASP.NET Core Runtime BinariesLinux Alpinex64
ARM32
ARM64
Download .NET 9 Preview 1 ASP.NET Cores

Click on this link for more .NET 9 download options.

Once downloaded, simply execute the package and proceed with the on-screen instructions to install .NET .

Once you have installed the newer .NET preview version, all your applications will run using the new build as the previous preview version will be replaced. However, if a stable version is installed and running, it will not be replaced.

When installed, you may check which .NET version is running by running the following command in Command Prompt:

wmic product get description | findstr /C:.NET

What’s new in .NET 9 Preview 1

.NET 9 will be the regular release of .NET, as opposed to .NET 8, which was the Long Term Servicing (LTS) release. .NET 9 Preview 1 marks a new era for the .NET developers. This .NET version brings breaking changes to the technology with a primary focus on cloud integration and intelligent application development.

The following are the focus areas and new features in .NET 9 Preview 1:

Platform for Cloud-Native Developers

Microsoft is now more focused on delivering paved paths to popular production infrastructure and services. For example, running in Kubernetes and using managed databases and caching services like Redis.

These capabilities come together with .NET Aspire, which significantly reduces the cost and complexity of building cloud applications and the distance between development and production.

Microsoft has also been developing Native AOT and application trimming as key tools for optimizing production apps. Moreover, Microsoft is working on optimizing all applications for both trimming and AOT with .NET 9, which was only limited to Web API apps with .NET 8.

Tools for Cloud-Native Developers

Visual Studio and Visual Studio Code will now include new development and deployment experiences for .NET Aspire. This will include configuring components, debugging (including hot-reload) the AppHost and child processes, and fully integrating with the developer dashboard.

Developers will be able to deploy their projects to Azure Container Apps, from Visual Studio, Visual Studio Code, and Azure Developer CLI.

Artificial Intelligence in .NET 9

Microsoft already made major improvements to .NET 8 by adding AI capabilities for the developers to incorporate it into their apps. With .NET 9, Microsoft aims to take it a step further and add the ability for them to add AI to their new as well as existing applications.

We are committed to making it even easier for .NET developers to integrate artificial intelligence into their existing and new applications.

.NET team at Microsoft

The list does not end here. Microsoft is also working on other new features that will hopefully be discussed in depth soon. To read more about the new features in .NET 9, read the .NET 9 Preview 1 announcement post.

.NET 9 Release History

Complete VersionRelease DateSignificant ImprovementsAnnouncement
.NET 9 Preview 212-Mar-24New options for serialization, performance upgrades, new CountBy and AggregateBy methodsMicrosoft announces .NET 9 Preview 2
.NET 9 Preview 113-Feb-24Improvements to AI integration for developers, focus on cloud-native and intelligent app creation. Microsoft announces .NET 9 Preview 1
.NET 9 version history
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Subhan Zafar is an established IT professional with interests in Windows and Server infrastructure testing and research, and is currently working with Itechtics as a research consultant. He has studied Electrical Engineering and is also certified by Huawei (HCNA & HCNP Routing and Switching).

2 comments

  • Usman Khurshid
    Usman Khurshid

    Does .NET 9 run alongside.NET and earlier versions? Is there a possibility to run the apps using specific framework?

    • Subhan Zafar
      Subhan Zafar

      Hi,
      The answer to the first part of your question is Yes. As with all .NET versions, you can install multiple .NET versions simultaneously, including .NET 9.
      Moreover, when developing a .NET application, the developer can instruct the app to target a specific .NET version. But in case the user has multiple .NET versions installed, they can make a minor tweak to change the preferred .NET version to be used by the app.
      This can be done by using the element in the “.exe.config” file. Here is an example:
      <configuration> <startup> <supportedRuntime version="v2.0.50727"/> </startup> </configuration>

      In the example above, you can use your preferred .NET version by providing the complete version build, as long as it is supported by the .NET app.

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