I have a create PDF method that creates a PDF as a memory stream. It is used to response out to the browser a PDF doc. I need a button that is going to on click take that memory stream and write it to a physical file on disk. In MVC is there anyway to handle this and also somehow alert the user that file is completed? Hoping in some action result I can do this. Best case would be showing a processing thing but right now just simply how to handle this.