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tfsmsbuildtfs-2015build-error

How can I resolve the following xmlns MSBuild error?

I have a .NET Standard 4.7.2 solution that builds locally just fine. On trying to run a CI build in TFS 2015 sp3, I am seeing the following error. I tried the prescribed change, adding the xmlns value to each project in the solution, but the error still occurs. How can I resolve this, please?

The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.

Thanks much.

Solution

  • Apparently, the Microsoft.Net.Compilers v3.8.0 nuget package got added to the solution (not sure how...) and was overriding the TFS MSBuild agent. I removed the package and things are building again