Which part of a GUID is most worth keeping?

Question

I need to generate a unique ID and was considering Guid.NewGuid to do this, which generates something of the form:

0fe66778-c4a8-4f93-9bda-36622         


        

Answer 1

Keep all of it.

From the above link:

* Four bits to encode the computer number,
* 56 bits for the timestamp, and
* four bits as a uniquifier.

you can redefine the Guid to right-size it to your needs.