public override string ToString()
{
JSONObject jo = new JSONObject(JSONObject.Type.OBJECT);
JSONObject members = new JSONObject(JSONObject.Type.OBJECT);
members.AddField("ProductId", ProductId);
members.AddField("Price", Price);
members.AddField("PriceLocale", PriceLocale);
jo.AddField("Product", members);
return jo.ToString();
}