SPhotonix Touts 5D Glass Storage To Preserve Data For Billions Of Years

A method of storing data within fused silica glass encodes in five dimensional space and should last up to 13.8 billion years ...
Ars Technica

C#, Stream with Xml data, need to change the contents

First off, I really don't understand streams. There's the Stream stream, and the MemoryStream stream, FileStream stream and probably a lot more. I understand how they are useful, but cannot really ...