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        FileStream FS;
        TextWriter TW;
        StreamReader SR;
        XmlSerializer XS = new XmlSerializer(typeof(DataClass));
        DataClass DC = new DataClass();

...

        /*
         *    L A D E N ...
´        */
        public void LoadXml()
        {
            if (File.Exists(FILE))
            {
                try
                {
                    SR = new StreamReader(FILE);
                    DataClass DC = (DataClass)XS.Deserialize(SR);
                    SR.Close();
                    iNotesLength = DC.Name.Count;
                }
                catch (Exception e)
                {
                    MessageBox.Show("Fehler beim Laden!\nError: " + e.Message);
                }
            }
        }



        /*
         *    S P E I C H E R N
         */
        public void SaveXml()
        {
            try
            {
                FS = File.Open(FILE, FileMode.Create);
                TW = new StreamWriter(FS);
                XS.Serialize(TW, DC);
                TW.Close();
                FS.Close();
            }
            catch (Exception e)
            {
                MessageBox.Show("Fehler beim speichern!\nError: "+e.Message);
            }
        }
...

    public class DataClass
    {
        public List<string> Name = new List<string>();
        public List<string> Text = new List<string>();
    }					

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//  falsch:
DataClass DC = (DataClass)XS.Deserialize(SR);
//  richtig:
DC = (DataClass)XS.Deserialize(SR);