Since you're using ASP.NET, why not use the default/built-in function of ASP.NET's twitter helper?
This[
^] page has almost most of the concepts explained for users using the twitter helper.
For example you can search for content using this code and show the relevant tweets on the web page you're having.
@Twitter.Search("#flu", "370310477957435392")
Since we're not sure what the second parameter is meant for, you can omit it, ASP.NET team says,
Quote:
Not all of the parameters shown below are required. The optional parameters are used to customize how the button or widget is displayed.
Read more on the page I have attached.