Hi Mickaël,
I am using SonarScanner for MSBuild 4.10 with MSBuild v15.0.
I have edited the SonarQube.integration.targets file so that it outputs the tags (see bug 892) and verified that indeed SonarExclude is setting to true but yet it still errors out for duplicate project GUID.
I have however created a blank WPF project and made sure it created the temporary WPF project, but not able to replicate the issue. So I am not sure exactly what the issue could be, it seems related to how we are building the specific project (it is rather complex) so I am trying to find out what exactly it is.
Regards,
Steven