bool HasXbuildFileBug ()
{
if (hasXbuildFileBug == null) {
var p = new Project ();
p.FullFileName = "foo";
p.LoadXml ("<Project xmlns=\"http://schemas.microsoft.com/developer/msbuild/2003\"/>");
hasXbuildFileBug = p.FullFileName.Length == 0;
}
return hasXbuildFileBug.Value;
}