Class library gets converted to dll files if they do not have an entry point namely the public shared sub main()(in VB.NET).They contain methods,properties and other entities which can be used in another class when the library dll is refered with the namespace in the other class.
A set of reusable objects which may be used within the context of a framework
but may also be used as stand-alone objects. The .NET Framework class library is
a library of classes, interfaces, and...