[Closed] First time using c# and maxscript issue

I’ve been using maxscript for sometimes but it’s the first time that I have to use a .dll to do something.
I use that dll to compress a jpg and convert it while writing some jpg data inside an xml file.
the core of the Csharp part wasnt writen by me.

namespace testCSharp
{
    public class convertObj
    {
            string theName;
            // theName = the jpg file
            public void buildXml(string theName)
            {
                     //do some stuff
            }
    }
}

what i’d like to do is to execute the part inside the buildXML part
I tried loading the dll using the dotnet load assembly but then when I try to load the dotnet object with a command like:

aa = dotnetObject "testCSharp.ConvertObj"

I get

-- Runtime error: Cannot resolve type: testCSharp.ConvertObj

so yeah … I’m kinda stuck here, I managed to get my script running and do the stuff inside visual studios but i’m unable to get it working from max