Android / iOS Cross Platform Application template does not build in Visual Studio 2026

[pozyx]

Describe the bug

I am not able to build Android and iOS project in Visual Studio 2026 (.NET 10).

To Reproduce

1. Run Visual Studio 2026
2. File -> New -> New Project/Solution
3. Select Avalonia Cross Platform Application (AvaloniaUI)
4. Framework dropdown is pre-set to .NET 8.0 - .NET 10 entry is not there, cannot be changed (this works for other project types for example MAUI)
5. click Create
6. Try to build solution

Desktop and Browser projects build and run fine

Android build fails with:

• error NETSDK1202: The workload 'net8.0-android' is out of support and will not receive security updates in the future
• error NU1202: Package Avalonia.Android 11.3.9 is not compatible with net8.0-android21.0 (.NETCoreApp,Version=v8.0). Package Avalonia.Android 11.3.9 supports: net8.0-android34.0 (.NETCoreApp,Version=v8.0)
• error NU1202: Package Xamarin.AndroidX.Core.SplashScreen 1.0.1.15 is not compatible with net8.0-android21.0 (.NETCoreApp,Version=v8.0). Package Xamarin.AndroidX.Core.SplashScreen 1.0.1.15 supports: net8.0-android34.0 (.NETCoreApp,Version=v8.0)

iOS build fails with:

• error NETSDK1202: The workload 'net8.0-ios' is out of support and will not receive security updates in the future
• error NETSDK1135: SupportedOSPlatformVersion 13.0 cannot be higher than TargetPlatformVersion 1.0

Attempt to update NuGet packages fails for these:

• NU1202: Package Avalonia.iOS 11.3.11 is not compatible with net8.0-ios1.0 (.NETCoreApp,Version=v8.0). Package Avalonia.iOS 11.3.11 supports:
  • net8.0-ios17.0 (.NETCoreApp,Version=v8.0)
  • net8.0-tvos17.0 (.NETCoreApp,Version=v8.0)
• NU1202: Package Avalonia.Android 11.3.11 is not compatible with net8.0-android21.0 (.NETCoreApp,Version=v8.0). Package Avalonia.Android 11.3.11 supports: net8.0-android34.0 (.NETCoreApp,Version=v8.0)
• NU1202: Package Xamarin.AndroidX.Core.SplashScreen 1.2.0.1 is not compatible with net8.0-android21.0 (.NETCoreApp,Version=v8.0). Package Xamarin.AndroidX.Core.SplashScreen 1.2.0.1 supports:
  • net10.0-android36.0 (.NETCoreApp,Version=v10.0)
  • net9.0-android35.0 (.NETCoreApp,Version=v9.0)

I tried manually change all projects target to .NET 10 in project settings.

Android build errors afterwards:

• error NU1202: Package Avalonia.Android 11.3.9 is not compatible with net10.0 (.NETCoreApp,Version=v10.0). Package Avalonia.Android 11.3.9 supports: net8.0-android34.0 (.NETCoreApp,Version=v8.0)
• error NU1202: Package Xamarin.AndroidX.Core.SplashScreen 1.0.1.15 is not compatible with net10.0 (.NETCoreApp,Version=v10.0). Package Xamarin.AndroidX.Core.SplashScreen 1.0.1.15 supports: net8.0-android34.0 (.NETCoreApp,Version=v8.0)

iOS build error afterwards:

• error NETSDK1135: SupportedOSPlatformVersion 13.0 cannot be higher than TargetPlatformVersion 1.0.

NuGet packages update errrors afterwards:

• NU1202: Package Avalonia.Android 11.3.11 is not compatible with net10.0 (.NETCoreApp,Version=v10.0). Package Avalonia.Android 11.3.11 supports: net8.0-android34.0 (.NETCoreApp,Version=v8.0)
• NU1202: Package Xamarin.AndroidX.Core.SplashScreen 1.2.0.1 is not compatible with net10.0 (.NETCoreApp,Version=v10.0). Package Xamarin.AndroidX.Core.SplashScreen 1.2.0.1 supports:
  • net10.0-android36.0 (.NETCoreApp,Version=v10.0)
  • net9.0-android35.0 (.NETCoreApp,Version=v9.0)
• NU1202: Package Avalonia.iOS 11.3.11 is not compatible with net10.0-ios1.0 (.NETCoreApp,Version=v10.0). Package Avalonia.iOS 11.3.11 supports:
  • net8.0-ios17.0 (.NETCoreApp,Version=v8.0)
  • net8.0-tvos17.0 (.NETCoreApp,Version=v8.0)
• NU1202: Package Avalonia.iOS 11.3.11 is not compatible with net10.0-ios1.0 (.NETCoreApp,Version=v10.0) / iossimulator-x64. Package Avalonia.iOS 11.3.11 supports:
  • net8.0-ios17.0 (.NETCoreApp,Version=v8.0)
  • net8.0-tvos17.0 (.NETCoreApp,Version=v8.0)

Expected behavior

1. Run Visual Studio 2026
2. File -> New -> New Project/Solution
3. Select Avalonia Cross Platform Application (AvaloniaUI) - or other
4. Framework dropdown can be set to .NET 10
5. click Create
6. Try to build solution

Desktop and Browser, Android and iOS projects build and run.

Updating Avalonia.Android, Avalonia.iOS and Xamarin.AndroidX.Core.SplashScreen NuGetPackages to latest succeeds.

Avalonia version

11.12.0 (latest version of Avalonia for Visual Studio extension), 11.3.9 (packages Avalonia.Android and Avalonia.iOS - cannot be updated to latest 11.3.11)

OS

Windows

Additional context

No response

[pozyx]

Update: How I made it working is editing project files.

For Android project:

<TargetFramework>net10.0-android</TargetFramework>
<SupportedOSPlatformVersion>23.0</SupportedOSPlatformVersion>

For iOS project:

<TargetFramework>net10.0-ios26.2</TargetFramework>
<SupportedOSPlatformVersion>26.2</SupportedOSPlatformVersion>

For remaining projects:
<TargetFramework>net10.0</TargetFramework>

After that all builds and works.