What C# snippet can "extract" part of a giant text file from its middle?

Question

C++ / C#

There is a large text file (> 1GB)
You need to get a piece of its contents starting from a certain byte No. 1 ending with a certain byte No. 2
For example, take information starting from 1000 Kb (from the beginning of the file) with a size of 100 Kb

Answer 1

https://www.dotnetperls.com/seek (+ save to file)