As I explained in this post Consuming twitter stream API, Tweetinvi API provides easy to configure Streaming API access.
You can download it here : http://tweetinvi.codeplex.com/
A Stream class exist and will enable you to easily implement a delegate to read the content coming from Twitter.
The class has been tested on real-life projects and is able to retrieve millions of tweets per day.
I am one of the developer working on the project.
