Serialize using a DataContractSerializer

DataContractSerializeUtil.cs

public static string DataContractSerialize(object serializableObject)
{
   if (serializableObject == null)
   {
     return null;
   }
   using (MemoryStream memoryStream = new MemoryStream())
   {
      DataContractSerializer serializer = new DataContractSerializer(serializableObject.GetType());
      serializer.WriteObject(memoryStream, serializableObject);
      return Encoding.UTF8.GetString(memoryStream.ToArray());
   }
}