public void loaddata()
    {
        ReferalPurchasedata data = SaveSystempurchase.loaddatapurchase();

        //local
        noads               = data.noads;
        ReferalClaimed      = data.ReferalClaimed;
        otherreferalclaimed = data.otherreferalclaimed;
    }
    public static void savedatapurchase(ReferalPurchasedata data)
    {
        BinaryFormatter formatter = new BinaryFormatter();
        string          path      = Application.persistentDataPath + "/purchase.data";
        FileStream      stream    = new FileStream(path, FileMode.Create);

        formatter.Serialize(stream, data);
        stream.Close();

        Debug.Log("saveedpurchase");
    }
    public static ReferalPurchasedata loaddatapurchase()
    {
        string path = Application.persistentDataPath + "/purchase.data";

        if (File.Exists(path))
        {
            BinaryFormatter formatter = new BinaryFormatter();
            FileStream      stream    = new FileStream(path, FileMode.Open);

            ReferalPurchasedata data = formatter.Deserialize(stream) as ReferalPurchasedata;
            stream.Close();
            Debug.Log("loadedpurchase");

            return(data);
        }
        else
        {
            Debug.Log("no file to load" + path);
            return(null);
        }
    }