I have been using TweetSharp lately and I am pretty happy with it so far. One thing that was a little confusing is how they implemented paging in their API on top of the Twitter API. 

What they did was to use the LINQ syntax (Skip and Take). Basically, think of Skip as the page number and Take as the number of records on a page. So, let's say you want to download all of a person's tweets. This assumes of course that you've already gone through the OAuth process and have permission to do so.  Twitter lets you download a maximum of 3200 tweets from a user, 200 tweets at a time.

So, the code to grab all of a user's tweets using TweetSharp would be as follows:

            for (int i = 1; i < 17; i++)
            {
                var query = FluentTwitter.CreateRequest()
                       .AuthenticateWith(_consumerKey,
                                         _consumerSecret,
                                         _accessToken,
                                         _accessKey)
                       .Statuses().OnUserTimeline().Take(200).Skip(i).AsXml();
                var responses = query.Request().AsStatuses();
                if (responses.Count() > 0)
                {
            //do something with tweets
                }
                else
                {
                    break;
                }
         } 

 So, what's going on here?  Basically I am attempting to download all 3200 tweets with a for loop, asking to take 200 tweets for each page, which is my counter. If I get less than 3200, I exit the loop, thus not unnecessarily calling the Twitter API (and increasing my chances of getting rate limited).