build error: 275='IAddChildInternal' at TFM net35 with dotnet8

[peaceshi]

Description

WPF unknown error

Reproduction Steps

https://github.com/kongying-tavern/wpf-template/tree/main

Expected behavior

This template works with dotnet6 and dotnet7 except dotnet8

Actual behavior

build success with dotnet8

Regression?

No response

Known Workarounds

No response

Impact

No response

Configuration

No response

Other information

No response

[lindexi]

@peaceshi Could you add the log of build error?

[lindexi]

I can repro your issues, and the error message is:

  WpfApp net35 failed with 2 error(s) and 2 warning(s)  
    C:\Code\kongying-tavern_wpf-template\templates\WpfApp\App.xaml(5,43): error MC1000: Unknown build error, 'Known type value 275='IAddChildInternal' is not a valid known type. Line 5 Position 43.'
    C:\Code\kongying-tavern_wpf-template\templates\WpfApp\MainWindow.xaml(8,53): error MC1000: Unknown build error, 'Known type value 275='IAddChildInternal' is not a valid known type. Line 8 Position 53.'
WpfApp net6.0-windows succeeded with 2 warning(s) (0.1s)
Build failed with 2 error(s) and 6 warning(s) in 0.8s

This error is thrown by WPF's PresentationBuildTasks.

[peaceshi]

It’s been 7 days, any progress?

[lindexi]

@peaceshi Sorry, no. I guess it's a compatibility problem with PresentationBuildTasks.