[Serializable]
    public class Settings
    {
        public string IndirizzoIP                       { get; set; }
        public string Porta                              { get; set; }
        public string AltraProprietàDiSetting    { get; set; }
        ...
        ...
    }

    public static class SettingSerializer
    {
        public static void Serialize(Settings sett)
        {
            using (FileStream fs = File.Open(Directory.GetCurrentDirectory() + @"\Settings.xml", FileMode.Create))
            {
                XmlSerializer xmlser = new XmlSerializer(typeof(Settings));
                xmlser.Serialize(fs, sett);
            }
        }

        public static Settings Deserialize()
        {
            using (FileStream fs = new FileStream(Directory.GetCurrentDirectory() + @"\Settings.xml", FileMode.Open))
            {
                return ((Settings)(new XmlSerializer(typeof(Settings))).Deserialize(fs));
            }
        }
    }