Does the appdomain load automatically dependencies?

Hi experts

i have 3 dll,

when a create a new appdomain and load the first DLL, which one has referenced (dependencies) on the 2 other DLL, does the dependencies will be load into that appdomain?

and what about if i have 2 appdomain that use the same dll for different job, if i unload one, i won't be able to update this DLL right? i have to unload ALL appdomain that use the dll?

regards