I have a field in the db that store a json string and I want that when I return it in a json result that will be returned as json raw data and not warped with quotes as str
You will need to unserialize the data. C# offers a class to handle JSON data.
http://msdn.microsoft.com/en-us/library/system.runtime.serialization.json.datacontractjsonserializer.aspx
Excerpt from http://msdn.microsoft.com/en-us/library/bb412179.aspx :
Normally, JSON serialization and deserialization is handled automatically by Windows Communication Foundation (WCF) when you use data contract types in service operations that are exposed over AJAX-enabled endpoints. However, in some cases you may need to work with JSON data directly - this is the scenario that this topic demonstrates.
//Deserialize the JSON-encoded data into a new instance of Person by using the ReadObject method of the DataContractJsonSerializer.
stream1.Position = 0;
Person p2 = (Person)ser.ReadObject(stream1);
//Show the results.
Console.Write("Deserialized back, got name=");
Console.Write(p2.name);
Console.Write(", age=");
Console.WriteLine(p2.age);