I have a json response like
{ \"appStatus\":{ \"status\":true }, \"lastSyncDate\":\"06-07-2013 13.54.27\", \"configResponse\":{ \"status\":{
You can parse JSON string into JObject, get sub-object "configResponse", then deserialize it into ConfigResponse. It's one line of code:
JObject
ConfigResponse
JObject.Parse("{...}")["configResponse"].ToObject()
If you need a custom serializer to set deserialization options, you can pass it to ToObject() method.
ToObject()