Adapt to removal of Windows Arm32 .NET debugging

.NET support for Windows on Arm32 has ended. Debugging support for this platform will be removed from Visual Studio 2022 starting with the 17.14 update. This article lists potential options for customers currently debugging .NET Code on Windows Arm32.

Option 1: Run code in an Arm64 process

If your device runs Arm64 Windows or can be upgraded to it, the easiest way is to migrate the debugged process from Arm32 to Arm64. How to manage the switch to Arm64 depends on the type of project you're using:

• For Universal Windows Platform (UWP) apps, see Update app architecture from Arm32 to Arm64.
• For processes that have their own native executable that's self-hosting the .NET Runtime, the native project needs to be configured to target Arm64.
• If the executable project is a .NET project, then something is likely specifying the RuntimeIdentifier MSBuild property. RuntimeIdentifier should be updated to target win-arm64 instead of win-arm (or similar runtime IDs).

Option 2: Use an older version of Visual Studio

Visual Studio 17.12 can be used from the Long-Term Servicing Channel (LTSC). For more information, see Visual Studio Product Lifecycle and Servicing.

Option 3: Start without debugging

If you have a project that you still want to run but doesn't require debugging, use Debug->Start without debugging to run the project. Since the debugger isn't available, you would need to diagnose any problems by using logging.

Option 4: Target Linux

The .NET Runtime continues to support Arm32 Linux. For IoT hardware that isn't capable of running Arm64 Windows but is capable of running Arm32 Linux, the only supported path for running .NET Code on that hardware would be to switch to Linux.