Critically, .NET 8 is designed for . Unlike its predecessor .NET Framework, which globally replaced versions, .NET 8 can coexist peacefully with .NET 6 (the previous LTS) and .NET 7 (STS). This is facilitated by global.json files, which pin a project to a specific SDK version. When a developer downloads .NET 8, they are not forced to migrate existing production applications immediately. Instead, they can begin experimenting with new features—such as the native Ahead-of-Time (AOT) compilation, enhanced JSON serialization, and the new TimeProvider class for testable time-based logic—in isolated projects without breaking legacy code.
Create a new "Hello World" web app to test the installation:
: Highly Recommended. This is the "all-in-one" package for developers. It includes the tools to build, test, and publish apps, plus all the runtimes listed below. dotnet 8 download
C# 12 is supported only on . NET 8 and newer versions. C# 11 is supported only on . NET 7 and newer versions. BDRShield How to upgrade from .NET 7 to .NET 8 - Uno Platform How to upgrade from . NET 7 to . NET 8 * First, read What's New in . NET 8. * Install Visual Studio 17.8 or later and run uno. che... Uno Platform .NET - Wikipedia The most recent version of . NET is . NET 10, released in November 2025, which is a long-term support (LTS) version, and is schedu... Wikipedia You must install or update .NET to run this application Jul 27, 2022 —
# Get the Microsoft signing key wget https://packages.microsoft.com/config/ubuntu/22.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb sudo dpkg -i packages-microsoft-prod.deb rm packages-microsoft-prod.deb Critically,
You should see 8.0.xxx listed. If you have multiple versions installed (e.g., .NET 6 and .NET 8), you can verify which one your project is using by checking the global.json file in your project directory, or by creating a new project which defaults to the latest stable SDK.
For Ubuntu 24.04+, use: sudo apt-get update && sudo apt-get install -y dotnet-sdk-8.0 . When a developer downloads
Nevertheless, a successful download is only the first step. Due diligence requires verification. Developers should always validate the integrity of their download by checking the SHA-512 hashes provided on the official download page. Additionally, after installation, running dotnet --info from a terminal is an essential diagnostic step. This command displays the installed SDK versions, runtime versions, and the base operating system path—immediately confirming a successful installation and revealing potential conflicts.
Downloading .NET 8 is a straightforward process, but choosing between the SDK and Runtime is critical. For developers, the SDK is mandatory. For production servers hosting the app, the Runtime is sufficient and more secure.