Bitcoin_QR_Popup.Form1.save_exchange_rates_in_settings C# (CSharp) Method

        private void save_exchange_rates_in_settings()
        {
            MemoryStream memoryStream = new MemoryStream();
            BinaryFormatter binaryFormatter = new BinaryFormatter();
            binaryFormatter.Serialize(memoryStream, exchange_rates);
            string str = System.Convert.ToBase64String(memoryStream.ToArray());
            Properties.Settings.Default.exchange_rates = str;
            Properties.Settings.Default.Save();
        }