JSONHelper

  public class JSONHelper
        {
            public static string Serialize<T>(T obj)
            {
                System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(obj.GetType());
                MemoryStream ms = new MemoryStream();
                serializer.WriteObject(ms, obj);
                string retVal = Encoding.Default.GetString(ms.ToArray());
                ms.Dispose();
                return retVal;
            }

            public static T Deserialize<T>(string json)
            {
                T obj = Activator.CreateInstance<T>();
                MemoryStream ms = new MemoryStream(Encoding.Unicode.GetBytes(json));
                System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(obj.GetType());
                obj = (T)serializer.ReadObject(ms);
                ms.Close();
                ms.Dispose();
                return obj;
            }
        }