Fix behavioral regression in Mvc.Testing #34449
Merged
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As part of the changes made in f7e1712, we introduced a behavior change that caused the
WebApplicationFactoryto throw an exception if it did not find aContentRootin the manifest file.This is breaking from the previous implementation that fell back to a path relative to the app assembly if a
ContentRootattribute wasn't defined in the assembly.Update the method signature of
GetContentRootFromFileto match the signature ofGetContentRootFromAssemblyand return astring?without throwing an exception.Fixes #34354