I have 3 temporary files being created in obj/debug: E.g. TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs (The guids don't seem to change even after a solution clean) My build is failing because: SA1633: The file has no header, the header Xml is invalid, or t