#470 System.ArgumentException while writing HTML File generated

[vitallis]

I have a module that developed with C++ as a
combination of managed and unmanaged code. As NDoc
makes HTML file names with Reflection some names have
charactes which are not allowed in Path Name. This
cause System.ArgumentException while generating Help
Project. For example, I have got names from unmanaged
code like this
"ndocATL_NoAddRefReleaseOnComPtr<ICatRegister>Class
Topic_ec4248fa.html"
Would be a good option to skip unmanaged types in
metadata.