private void UC_ComboBox_ModeleSelect_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (!this.IsLoaded)
            {
                return;
            }

            int index = UC_ComboBox_ModeleSelect.SelectedIndex;

            NotificationSystem.Show(new Notification {
                Message = index.ToString()
            });
            switch (index)
            {
            case 0:
                ContentControl = new Internal.Editor.MatriculaEditor();
                UC_DockPanel_Content.Children.Add((UserControl)ContentControl);
                break;
            }
        }