Embedding XML inside a C-comment (as a standard) is just fucked up. Do you have correct syntax highlighting with that?
(I don't. But even if emacs would understand this, it's still wrong)
What's even worse is that Visual Studio 2015 just vomits out that the XML is malformed when I have C++ headers with Doxygen style comments in them. It detects the three slashes and tries to apply C# XML docs parsing to them and that of course fails. Meanwhile NetBeans can handle them no problem and display parsed docs in pop ups.