Dara, it depends! in this post, most of the mushrooms in the pictures are inedible. the edible ones are in the basket, and in the frame with snails, named britlegills' (Russula sp.)
This mushroom specie do not suit for preservation, so, yes -- it is harvested, and immediately processed.
There are other species (not featured in this post) that we prefer to preserve as dried (they are considered 1st grade mushrooms in our country).

And for some other species the best option is pickling. Hope this was the answer for your question!