Welcome!
I am curious to find out what happened. How did she react?
If you haven't told her by now, I suggest that you print out a page from the internet describing the symptoms, omitting any headlines, and simply leave it on the table so that she can find it when she comes home from shool. This is a way to exploit her inate curiosity in the topic. It is important that you are nearby exatly when she has read it through, and are there to begin the conversation. You should first state that you did leave the paper out for her, then that a doctor has diagnosed her, and finally that there is nothing wrong with her. The last point can be elaborated by telling about this site and that she is not alone. At an age of 16, she will have figured all of this out (except for the diagnosis part) a long time ago. She only needs CLEAR confirmation of the facts.
Give it a day or two for her to accept the diagnosis. Expect that she will come and ask for details about the diagnosis so that she can determine for herself that the diagnosis is not wrong. The list of symptoms on the initiator paper will have done most of the heavy lifting. I would expect her to deny the asperger possibility stronger, if she has not read the symptoms. There is no need to remove anything else than the headline from say the wikipedia description. Also shorten it to one page or so.
When I first came across a list of symtoms, quite by accident, I identified myself and began to look for the name of the disorder. It was a great relief that what I had, had a name even if I could not confirm it. Your daughter is lucky in that she already has a diagnosis. If you got a statement from the doctor, have it ready as she might as for it.