What is the reason behind <assemblies> tag in web.config?

Question

I am currently working on a web site and have just came across a missing assembly reference problem, which made me come up with this question:

Is not it true to say that all the needed assemblies in configuration/system.web/compilation/assemblies tag already exist in related asp project dll file? So there would not be a need to put all of these references into another place(i.e. assemblies tag) as this dll will be put on the server at the time of deployment(Am I wrong with this?)

I don't have much experience in asp.net. I think my question should be somehow related to the web site deployment concepts and my lack of knowledge of how it works.

I have googled my question in hope of finding some useful reference, but nothing found.

I have already seen this tag What is difference between web.config assemblies element and project file Reference element but it wasn't useful for me.

Any help or reference would be appreciated.

Answer 1

I finally found a suitable answer, the tag is only needed when you want to have .cs code on the server for the on-the-fly compilation purposes, if precompilation mode are being used, as I have currently used it, the tag contents won't be needed.