DLL PROBLEM IN ASP.NET 2.0

Question

HI. FRIENDS

I AM WORKING IN ASP.NET 2.0.
I WANT TO KNOW THAT HOW TO BUILD DLL IN THE BIN FOLDER OF THE WEB APPLICATION.
IN ASP.NET 1.1,DLL FILE  CREATED IN BIN FOLDER WHEN WE BUILD APPLICATION.

PLZ GIVE ME SOLUTION AS SOON AS POSSIBLE