.NET 7 support in MAUI

[Redth]

Plain .NET 7

Building net7.0-ios, net7.0-android, etc apps with the .NET 7 SDK

Tooling

• VSCX Tools - insert tooling change, backport to insertion PR above (RE: Ema): https://devdiv.visualstudio.com/DevDiv/_git/VS/pullrequest/415759
• 1578234 Build agent can't install with net7.0
• Updates the path to illink when building from Windows
• 1578236 VS is unable to detect maui Hot Reload with net7.0
• 1588591 [XVS] Failed to start debug iOS project
• 1583660 [.NET7] New iOS app shows black screen when running from macOS CLI
• 1597616 [XVS][MAUI] Failed to Initialize Hot reload on Android and iOS platform
• 1598341 Build agent does not install all the things it needs (wasm-tools-net6)
• 1610989 [XVS][MAUI] Pair Mac failed with error “Could not install workload 'ios'...”
• 1611125 [XVS][MAUI] VS crashes when clicking on Live Visual Tree window
• 1601864 [XVS][MAUI] Failed to open MAUI and .NET 6 project properties page
• 1611404 [VS] Building a .NET 6 iOS project with .NET 7 fails
• 1601512 Infinite XAML Hot Reload System.Text.Json.Serialization recursion while debugging Android App
• 1598342 C# Hot Reload does not work on iOS from Hot Restart
• 1612273 Yellow bars and project exceptions

Platform SDK

• [MaciOS] .NET7 New iOS app shows black screen when running from macOS CLI
• [Android] Update dependencies from dotnet/installer
• [Android] Update dependencies from dotnet/installer
  • [dotnet/linker] Test lane timeout due to <ILLink/>
    - [ ] [dotnet/runtime] Builds using interpreter fail on iOS/MacCatalyst
  • [MAUI] Update dependencies from dotnet/installer
    • [Blazor] Account for Maui multi-rid builds
    • [Blazor] Allow customizing the static web assets base manifest paths if defined by the environment
      - [ ] [Android][MaciOS] Create intentional Build errors when building net6 from net7?
• Create Vendor Assessment for PR build
• 1611403 Remote iOS builds look for the ILLink.Tasks.dll in the wrong path when multitargeting

dotnet

• VS Insertion PR with NET7 resolver bits
• [mono][debugger] Fix infinite recursion and null pointer access while debugging
  • blocks 1578233 Hot Reload crashes net7.0-android app

Build net6.0-* MAUI apps from .NET 7 SDK

Spec: https://github.com/dotnet/sdk/blob/main/documentation/general/workloads/cross-version-workloads.md

• Arcade - Update Arcade + Workloads runtime#72947
  • Fix runtime publishing
    • Workload promotion runtime#73798
  • Same changes need to flow through to net7
    • .net7 arcade changes
    • Update to runtime for arcade changes
    • [release/7.0-rc1] Workload changes and arcade update (#171) emsdk#172
    • Fix package alias authoring in arcade and flow change
      • Additional fixes for workloads/multitargeting arcade#10488
        • [release/7.0-rc1] Update arcade to 7.0.0-beta.22418.4 runtime#74210
        • [release/6.0] Bump arcade to 6.0.0-beta.22418.3 runtime#74193
        • [release/6.0] Update dependencies from dotnet/emsdk runtime#74204
        • [release/7.0-rc1] Update arcade to 7.0.0-beta.22418.4 emsdk#182
        • [release/6.0] Bump arcade to 6.0.0-beta.22418.3 emsdk#179
• Change net6 package ids
  • Change the workload pack IDs to all be .net6 ending so they can be inserted into 17.4 for .net 7
  • Update all of the net 6 packs to be labeled .net6
  • [release/6.0] Don't lookup the pack without an alias from the workload runtime#74155
• Fix net6 versioning in arcade and flow
  • Fix versioning errors in workloads
    • Arcade update into runtime 6.0
    • Update arcade in emsdk
    • Add ManifestMsiVersion to CreateVisualStudioWorkload call runtime#73877
• EMSDK Workload changes
  • Update the emscripten manifest dependencies runtime#74119
• MonoToolchain (same changes effectively needed as EMSDK PR above)
  • [release/7.0-rc1] net7.0 + net6.0 workload multitargeting changes runtime#74018
  • Need to update the description in the above PR
  • [release/7.0-rc1] Roll forward to the latest 6.0.x builds by lewing · Pull Request #74288 · dotnet/runtime (github.com)
  • [release/7.0-rc1] Update ComponentResources versions and list by lewing · Pull Request #74365 · dotnet/runtime (github.com)
  • [release/7.0-rc1] Update workload manifest paths by lewing · Pull Request #74364 · dotnet/runtime (github.com)
• Fix emscripten signing blocker and flow to installer (impacts 6 and 7)
  • [release/7.0-rc1] Do not attempt to sign .cat files emsdk#190
    • [release/7.0-rc1] Update dependencies from dotnet/emsdk by dotnet-maestro[bot] · Pull Request #74456 · dotnet/runtime (github.com)
• [release/7.0-rc1][mini] double quote linker path in defined(LD_NAME) case by lambdageek · Pull Request #74453 · dotnet/runtime (github.com)
• Create net6 targeted resolver and sign it for VSMac https://github.com/dotnet/sdk/tree/release/7.0.1xx-rc1-VSMac
• Changes to how VS drops are produced:
  • xamarin/yaml-templates
  • xamarin/sdk-insertions#34
  • Android - net6.0
  • Android - net7.0
  • iOS - net6.0
  • iOS - net7.0
  • MAUI - net6.0
  • MAUI - net7.0
  • xamarin/sdk-insertions#33 (complete, does not need to be merged before product changes)
• Get the changes into a VS PR
  • Codeflow to installer
  • Update the baseline manifests
    • [release/7.0.1xx-rc1] update bundled manifests installer#14374
  • Signed build
  • Update runtime version in VS PR
  • VSDrops from both 6.0 and 7.0 for 17.4
    • 6.0 drop will have to have manual modifications to the 6.0 package versions to ensure an upgrade
    • 17.4 will need a special 6.0 drop with only the packages
  • Update VS setup authoring to handle multiple workloads as needed (wasm-tools-net6 for example)
  • Merge into VS
  • https://devdiv.visualstudio.com/DevDiv/_git/VS/pullrequest/421609
• Android - May need to update android to also extend microsoft-net-runtime-android-net6 and microsoft-net-runtime-android-aot-net6 workloads
• iOS / MacCatalyst / macOS - May need to update extends as in Android
• MAUI - [net7] include net6 templates #8203 - We may need to do more work here if the strategy for android/ios is not enough.
• [1581869][VS64] There is no ".NET 6.0" tfm on additional information dialog for Maui project on VS 17.4 preview 1
  • Closed by design?
• Linker produces colliding MVID for two different inputs Change was not backported to 6.0
• RC2 improvements identified
  • Arcade improvements identified
    • net6 arcade update
      • emsdk arcade update
      • runtime arcade update
    • Port workload changes from 6.0 arcade#10762
      • emsdk arcade update
      • runtime arcade update
  • [release/6.0] Fix VS component versions runtime#74324
  • Get drop creation automated and fixed
  • Improve runtime build time
  • Do not attempt to sign .cat files (#190) emsdk#191 -- RC2 only
  • Update implicit versions to be aligned with the monthly release
  • Port net6.0 targeted sdk resolver to rc2

Builds

• .net 7
• .net 6

VS PRs

• Pull request 419183: Update Emscripten and wasm-tools to support multitargeting - Repos (visualstudio.com) <-- please use this one
• Pull request 412410: Update to .NET 7 RC1 as the default SDK and runtime - Repos (visualstudio.com)

7.0-RC2

• iOS - net7.0

[Redth]

@jonathanpeppers and @dalexsoto we may need changes in android and macios workload manifests to support the changes from monotoolchain/emsdk. Could you create tracking items for these in your repos?

[SunshineSpring666]

hi, everyone.
Any update on MAUI's DOTNET 7 support? Now .NET 7 is in RC phase. Setting .NET version to 7 in project configuration ends up in errors which have no solutions yet on the internet.
Thanks.

[samhouts]

hi, everyone. Any update on MAUI's DOTNET 7 support? Now .NET 7 is in RC phase. Setting .NET version to 7 in project configuration ends up in errors which have no solutions yet on the internet. Thanks.

@SunshineSpring666 Have you reported those issues? If not, please open a new issue, and we'll take care of it! Thank you!