This update includes both security and non-security updates, therefore it is recommended for the users to update their frameworks to the latest build on priority. For that, Microsoft has also created a global command-line tool known as .NET Upgrade Assistant. The scope and functionality of this tool will be discussed further down the post. 1 vulnerability has been addressed with this release. Also, the SDKs accompanying this release are two different versions for two different versions of Visual Studio support, as .NET 5 is a more unified tool that combines .NET Framework, .NET Core, and Mono/Xamarin. If you are running Windows 10 version 1809 or higher, you will probably have .NET Framework 4.8. You can manually upgrade to .NET 5.0.4 using the download links provided below. You can also upgrade your app to .NET 5 regardless of which version of Framework they are currently on. Let us continue to discuss in detail what .NET 5 brings.
New features and improvements in .NET 5.0.4 Updated Docker images Update to fix Remote Code Execution vulnerability Supported Operating Systems/Requirements Download .NET 5.0.4 Runtime SDKs For Visual Studio 2019 v16.9 support For Visual Studio 2019 v16.8 support Installing .NET 5.0.4 How to upgrade applications using .NET Upgrade Assistant How .NET Upgrade Assistant works Download and use .NET Upgrade Assistant Closing words
New features and improvements in .NET 5.0.4
This update includes both security and non-security updates. Let’s see what those are:
Updated Docker images
You can now run the latest releases of .NET and Docker together using the command below: To check out more examples of recent updates made to Docker images, click here. Furthermore, the following repositories have also been updated:
dotnet/sdk: .NET SDKdotnet/aspnet: ASP.NET Core Runtimedotnet/runtime: .NET Runtimedotnet/runtime-deps: .NET Runtime Dependenciesdotnet/samples: .NET Samples
Microsoft made similar changes in their last stable release .NET 5.0.3. It seems that they are continuously working on enhancing the Docker experience for their consumers.
Update to fix Remote Code Execution vulnerability
Microsoft has also released security advisories for CVE-2021-26701 (.NET Core Remote Code Execution Vulnerability). Guidance for developers to protect their applications and remove these vulnerabilities is also included. According to Microsoft, a Remote Code Execution vulnerability exists in .NET 5 and .NET Core due to how text encoding is performed.
Supported Operating Systems/Requirements
.NET 5 can be installed on Windows 10 v1703 or higher. This is because it is only compatible with Visual Studio 2019 16.8 Preview 4 and above. Since the mentioned Visual Studio 2019 is only compatible with the following Operating Systems, the .NET 5.0.4 also only supports the following variants of Windows and Server:
Windows 10 version 1703 or higher. Editions: Home, Professional, Education, and Enterprise (LTSC and S are not supported)Windows Server 2019. Editions: Standard and DatacenterWindows Server 2016. Editions: Standard and DatacenterWindows 8.1 (with Update KB2919355). Editions: Core, Professional, and EnterpriseWindows Server 2012 R2 (with Update KB2919355). Editions: Essentials, Standard, DatacenterWindows 7 SP1 (with latest Windows Updates) Editions: Home Premium, Professional, Enterprise, Ultimate
Moreover, binaries are also available for x86, x64, ARM64, macOS, and Linux systems.
Download .NET 5.0.4
Use the direct download links below to download the .NET 5.0.4 Runtime and SDKs, according to your Operating System and architecture:
Runtime
Download .NET Desktop Runtime 5.0.4 for Windows x64 Download .NET Desktop Runtime 5.0.4 for Windows x86 Download .NET Desktop Runtime 5.0.4 for Windows ARM64 Download .NET Runtime 5.0.4 for macOS Download .NET Runtime 5.0.4 Binaries for Linux Arm32 Download .NET Runtime 5.0.4 Binaries for Linux Arm64 Download .NET Runtime 5.0.4 Binaries for Linux Arm64 Alpine Download .NET Runtime 5.0.4 Binaries for Linux x64 Download .NET Runtime 5.0.4 Binaries for Linux x64 Alpine
SDKs
For Visual Studio 2019 v16.9 support
Download .NET SDK 5.0.201 for Windows x64 Download .NET SDK 5.0.201 for Windows x86 Download .NET SDK 5.0.201 for Windows ARM64 Download .NET SDK 5.0.201 for macOS Download .NET SDK 5.0.201 Binaries for Linux Arm32 Download .NET SDK 5.0.201 Binaries for Linux Arm64 Download .NET SDK 5.0.201 Binaries for Linux x64 Download .NET SDK 5.0.201 Binaries for Linux x64 Alpine
For Visual Studio 2019 v16.8 support
Download .NET SDK 5.0.104 for Windows x64 Download .NET SDK 5.0.104 for Windows x86 Download .NET SDK 5.0.104 for Windows ARM64 Download .NET SDK 5.0.104 for macOS Download .NET SDK 5.0.104 Binaries for Linux Arm32 Download .NET SDK 5.0.104 Binaries for Linux Arm64 Download .NET SDK 5.0.104 Binaries for Linux x64 Download .NET SDK 5.0.104 Binaries for Linux x64 Alpine More download and install options here.
Installing .NET 5.0.4
Now that you have downloaded the respective installation package, you can begin to install it. The installation of the .NET 5.0.4 is an easy process. Download the file from the links provided above and execute it for installation. Once you have installed it, all your applications will run using the new build as the previous version will be replaced. You have now installed the .NET 5.0.4. You may check which .NET version is running by typing in the following command in Command Prompt:
How to upgrade applications using .NET Upgrade Assistant
The .NET Upgrade Assistant is a newly-launched global command-line tool that assists developers to upgrade their apps on older .NET Frameworks to .NET 5. The tool automates the process so that less time is spent on the upgrade and more time is spent on productivity. It is the perfect tool to speedily upgrade your existing applications. Let us try to understand how the Upgrade Assistant works.
How .NET Upgrade Assistant works
As we said, Upgrade Assistant is a command-line tool that needs to be executed and told what to do. However, it still has a process of its own it needs to go through to upgrade your application to an older Framework to .NET 5. Here is a list of the processes it performs, in the exact same order: Although this may seem like a cool process, some minor tweaks are required manually after the update process has been performed. You can find more guidance on what these manual steps are here in Microsoft’s video guide.
Download and use .NET Upgrade Assistant
You can download and install the .NET Upgrade Assistant as any other .NET tool: from the command line. Before you be, ensure that you have MSBuild installed on your PC. An easy way to do this is to install Visual Studio 2019 on your device. Once done, enter the following command in PowerShell with administrative privileges to install Upgrade Assistant. After installation, ensure that it is up to date by running the following command: Now that the tool has been installed and updated, all you need to do is use it to upgrade your applications to .NET 5. Use the command below to do so: In the command above, replace PathToCSProjOrSLN with the complete path to the project you want to upgrade, as in the example below: You will now be taken to the menu where you will perform the steps we have discussed in the “How .NET Upgrade Assistant works” section. Perform all of the steps on all the projects involved in the app, perform the manual tweaks provided in the guide by Microsoft and your app will now be updated to .NET 5.
Closing words
We recommend that if you were previously using .NET Framework to develop your applications, you should update them to the latest version right now using the Upgrade Assistant. Although it may require some additional manual steps to perform, you will benefit from performance gains as well as cutting down computing costs. We must warn you that some might experience issues that their older binaries may not be compiling after updating to .NET 5. A possible solution to this issue is to also install runtime.json as well. Do leave feedback and let us know if this solution worked for you or not if you encountered any problems in the first place.
