ScrollBar

    internal class SingleLineSyntaxEditor : ActiproSoftware.Windows.Controls.SyntaxEditor.SyntaxEditor
    {
        private static TChild[] GetChildren<TChild>(DependencyObject parent) where TChild : DependencyObject
        {
            var list = new List<TChild>();
            var cnt = VisualTreeHelper.GetChildrenCount(parent);
            for (var ix = 0; ix < cnt; ix++)
            {
                var child = VisualTreeHelper.GetChild(parent, ix) as TChild;
                if (child == null)
                    continue;
                list.Add(child);
            }
            return list.ToArray();
        }

        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();
            var adorner = GetChildren<AdornerDecorator>(this).FirstOrDefault();
            if (adorner == null)
                return;
            var outerBorder = adorner.Child;
            if (outerBorder == null)
                return;
            var viewHost = GetChildren<EditorViewHost>(outerBorder).FirstOrDefault();
            if (viewHost == null)
                return;
            var view = GetChildren<EditorView>(viewHost).FirstOrDefault();
            if (view == null)
                return;
            var outerGrid = view.Content as Grid;
            if (outerGrid == null)
                return;
            var innerGrid = GetChildren<Grid>(outerGrid).FirstOrDefault();
            if (innerGrid == null)
                return;
            var allOuterGridChildren = GetChildren<UIElement>(outerGrid);
            var peers = allOuterGridChildren.Except(new[] {innerGrid}).ToArray();
            foreach (var peer in peers)
            {
                peer.SetValue(VisibilityProperty, Visibility.Collapsed);
            }
            innerGrid.SetValue(Grid.RowProperty, 0);
            innerGrid.SetValue(Grid.ColumnProperty, 0);
            innerGrid.SetValue(Grid.RowSpanProperty, 4);
            innerGrid.SetValue(Grid.ColumnSpanProperty, 4);
        }
    }