Read string json with Json.NET

I want to implement a search in Google for my site using the data of codified return in the JSON strings.

  (http://code.google.com/apis/ajaxsearch/documentation/#fonje). 



In my code, I read the results within the following code (url is an example) : 



Dim client As WebClient = New WebClient

Dim urlFormat As String = ""

If String.IsNullOrEmpty(urlFormat) Then

urlFormat = "http://ajax.googleapis.com/ajax/services/search/web?v=1.0&q=Paris%20Hilton"

End If

Dim url As Uri = New Uri(urlFormat)

Dim Search As String = client.DownloadString(url)





I want to decode it, but I obtained an error: 

Dim reader As JsonTextReader = New JsonTextReader(New StringReader(Search))

reader.Rea ...