As regards XML comments, you must remember that they are
not stored in the DLL.
https://msdn.microsoft.com/en-us/library/vstudio/b2s063f7(v=vs.100).aspx[
^]
If you didn't create the XML file when you compiled the DLL, then you'll need to do so and keep it in the same directory as the DLL.
Remember that your project may copy the DLL to its own directory and then it won't be able to find the XML file, so you'll need to work around that.