I have tried to overwrite an existing assembly in the GAC and those the
operation seem to complete O.K nothing happened.

So someone told me it might be because I need to reset my computer in
order to reset the GAC

So I looked for a function that does exactly that without closing the
computer and found the function gacutil /cdl

I just wanted to make sure this doesn't delete (or un register) noting
from the GAC

So if you know what this function does please let me know