How can I upload a file and save it to a Stream for further preview using C#?

Sure is. I upload files (PDF/images) to my db in my app . My model object actually stores the file as a byte array but for other functions I have to convert to and from streams so im sure its just as easy to keep it in stream format.

Yes, but you can't save it to a stream. A stream doesn't contain any data, it's just the means for accessing the actual storage.

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