json parsing in windows phone 7

Following is basic example to parse JSON string

private void ParseJson()
{
    var jsonString =
        "{\"responseData\": {\"translatedText\":\"??? ???\"}, \"responseDetails\": null,\"responseStatus\": 200}";
    RootObject jsonObject = JsonConvert.DeserializeObject(jsonString);
    MessageBox.Show(jsonObject.responseData.translatedText);
}

//This class was generated with json2csharp
public class ResponseData
{
    public string translatedText { get; set; }
}

//This class was generated with json2csharp
public class RootObject
{
    public ResponseData responseData { get; set; }
    public object responseDetails { get; set; }
    public int responseStatus { get; set; }
}

Following links may help you to learn.

1) http://msdn.microsoft.com/en-us/library/ie/cc836466%28v=vs.94%29.aspx
2) http://upadhyayjitesh.blogspot.in/2012/12/windows-phone-json-parsing-example-part.html
3) http://nkishorchandra.blogspot.in/2012/10/parsing-json-in-windows-phone.html