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

If someone still have Problems with refreshing the AccessToken, maybe this can help you finding a solution:

            Google.GData.Client.RequestSettings settings = new RequestSettings("");
            Google.GData.Client.OAuth2Parameters parameters = new OAuth2Parameters()
            {
                ClientId = "",
                ClientSecret = "",
                AccessToken = "", //really necessary?

                RedirectUri = "urn:ietf:wg:oauth:2.0:oob",
                RefreshToken = "",
                AccessType = "offline",
                TokenType = "refresh",
                Scope = "https://www.google.com/m8/feeds/" //Change to needed scopes, I used this for ContactAPI
            };
            try
            {
                Google.GData.Client.OAuthUtil.RefreshAccessToken(parameters);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }