This has been asked, but wasn\'t answered. The answer (use /warn:1) doesn\'t work for msbuild.exe, only csc.exe. Perhaps I\'m missing something between csc and
/warn:1
http://social.msdn.microsoft.com/Forums/en-US/tfsbuild/thread/96b3ea2e-92ed-4483-bbfe-a4dda3231eb9
According to this, it cannot be suppressed.