private void Write(AppData appData)
        {
            if (appData == null)
            {
                File.Delete(DataFileName());
                return;
            }
            string data = JsonSerializer.Serialize(appData);

            data = EncryptAse256.EncryptString(data);
            File.WriteAllText(DataFileName(), data);
        }
 private AppData Read()
 {
     try
     {
         string data = File.ReadAllText(DataFileName());
         data = EncryptAse256.DecryptString(data);
         return(JsonSerializer.Deserialize <AppData>(data));
     }
     catch (Exception e)
     {
         Console.WriteLine(e.Message);
         return(null);
     }
 }