Why does my Managed C++ DLL not show Assembly information?

Question

I have a solution which consists of a number of C# binaries and a single C++ DLL. (The C++ DLL wraps some date/time-handling code that I need which pre-dates C#, and I don't want to have to rewrite it in C#.) All of the C# projects contain an AssemblyInfo.cs file, and the C++ project contains an AssemblyInfo.cpp file. All of the C# binaries display the Assembly Info when I right-click on them from the Windows File Explorer -- but the C++ DLL shows no such information. It's just blank, with no assembly data whatsoever. Is there something unusual that I need to know about getting an assembly's data to appear in DLL that's created from a Managed C++ project? This is very puzzling. Thanks for any help with this. Brian