Role Of DLLs in a ASP.NET Website

Question

Hi All,

I am new into the .NET architecture stuff. I am currently working on a web based ERP project using .NET. This project will be based on service oriented architecture.

I had a question regarding the role that number of DLLs (Projects/Class Libraries) plays in terms of performance of a web site.

Say for example, what would be the performance impact if have 4 projects/class libraries in my solution (which would be 4 DLLs) against a solution that has 12 projects (12 DLLs). Does the 12 DLL web site in any way take a performance hit ?

It would be great if you could point me to some resource which can point to the internal working of DLLs in .NET environment.

I am sorry if this question is in the wrong section.

Thanks in advance for any thoughts.