As usual, one sample I found a few minutes after posting had some crude working code:
https://stackoverflow.com/questions/15408053/c-sharp-example-of-downloading-github-private-repo-programmatically The 2nd answer from Alex has a skeleton of old fashioned working code that I adjusted and managed to get back a huge slab of JSON with all my public repo details. Now I have to try to get them all. *GK* >