dll is dynamic link library in which we can create customized namespaces.by including
this namespace in our application we can use the functions in our namespace.only
thing is we need to create object for the class.

like this:
using ournamespce.ourclassname;



by
muthu raj.
<EMAIL SNIPPED>

And you would create this dll just as you would any other by creating a class library.

dll means dynamic link library.
it is a executable and resuable file.
a dll is automatically created in asp.net when we build a project.u can referance this dll
in other projects

by using syntax
using u r dllname ; in c#

imports u r dll name