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

An access token will expire after 1 hour - after that time you will begin to receive "401 Invalid Credentials" errors when you make calls against a Google API.

I'm not familiar with the .NET Google API Client library - the Java and Python libraries will automatically make a request for a new access token when this occurs, depending on how you are creating the DriveService object. I would expect the .NET library to have similar semantics.