private void btnSaveNotes_Click(object sender, RoutedEventArgs e)
{
notesSaving.Note = tbNotes.Text;
notesHandler.SaveNotes(notesSaving, "Notes.xml");
tbNotes.Text = "Dina anteckningar är sparade!";
btnSaveNotes.Visibility = Visibility.Hidden;
btnLoadNotes.Visibility = Visibility.Visible;
}