Hi Anthony,
We are working to update our library to include a complete .NET 3LO sample, in the meanwhile please use the following Spreadsheet API code as reference.
Please note that it doesn't show how to retrieve the token key and secret, but only how to use them once you have them:
GOAuthRequestFactory requestFactory = new GOAuthRequestFactory("wise", APPLICATION_NAME);
requestFactory.ConsumerKey = "anonymous";
requestFactory.ConsumerSecret = "anonymous";
requestFactory.Token = TOKEN_KEY;
requestFactory.TokenSecret = TOKEN_SECRET;
requestFactory.UseSSL = true;
SpreadsheetsService myService = new SpreadsheetsService(APPLICATION_NAME);
myService.RequestFactory = requestFactory;
SpreadsheetQuery query = new SpreadsheetQuery();
SpreadsheetFeed feed = myService.Query(query);
...
Claudio