I created an app using Kind Of Magic and unfortunately it doesn't pass AppContainerCheck to be submitted in Windows Store (it will pass if I remove KoM targets from csproj).
Windows App Certification Kit error message: AppContainerCheck Test failed.
The AppContainerCheck verifies that the appcontainer bit in the portable executable (PE) header of an executable binary is set. Windows Store apps must have the appcontainer bit set on all .exe files and all unmanaged DLLs to execute properly.
What to do if your app fails this test
If a native executable file fails the test, make sure that you used the latest compiler and linker to build the file and that you use the /appcontainer flag on the linker.
If a managed executable fails the test, make sure that you used the latest compiler and linker, such as Microsoft Visual Studio, to build the Windows Store app.
This test is performed on all .exe files and on unmanaged DLLs.