FastColoredTextBoxNS.AutocompleteListView.DoSelectedVisible C# (CSharp) Method

        private void DoSelectedVisible()
        {
            if (FocussedItem != null)
                SetToolTip(FocussedItem);

            var y = FocussedItemIndex*itemHeight - VerticalScroll.Value;
            if (y < 0)
                VerticalScroll.Value = FocussedItemIndex*itemHeight;
            if (y > ClientSize.Height - itemHeight)
                VerticalScroll.Value = Math.Min(VerticalScroll.Maximum,
                    FocussedItemIndex*itemHeight - ClientSize.Height + itemHeight);
            //some magic for update scrolls
            AutoScrollMinSize -= new Size(1, 0);
            AutoScrollMinSize += new Size(1, 0);
        }