Google OAuth2: When and how to use refresh token

Question

I have an installed c# app with code working that gets the authorization code and exchanges it for an access token. I am storing off the refresh token. I know at some poin

Answer 1

Spent the last two days figuring out how to use and renew the access token using the refresh token. My answer is posted in another thread here:

How Google API V 3.0 .Net library and Google OAuth2 Handling refresh token