I'm trying to add a reference .dll to my dot net app. The problem is that when I try it says that the .dll I'm trying to add is not a dot net assembly. Please help!!!

.net is probably right in what it says. the dll that your are trying to add a reference to is probably niether a .net assembly nor a com dll. Explore in documentation a bit to get a better idea of what .net assemblies are and what all dlls .net supports.

Regards
Ankur Verma