Net create com dll name

Depending on which version of Visual Studio. NET you are running, try going to Project Properties -> Application, and then change the Assembly Name field. On earlier versions it might be in a different place but I think the Assembly Name field is still the one you are looking for.
To create a DLL File, click on New project, then select Class Library. Enter your code into the class file that was automatically created for you and then click Build Solution from the Debug menu. Now, look in your directory./debug/release/ YOURDLL.dll There it is! P. S. DLL files cannot be run just like normal applciation (exe) files. You'll need to create a separate project (probably a win forms app) and then add your dll file to that project as a Reference, you can do this by going to the Solution explorer, right clicking your project Name and selecting Add Reference then browsing to whereever you saved your dll file. For more detail please click HERE.