ICSharpCode.AvalonEdit.Editing.LineNumberMargin.OnMouseMove C# (CSharp) Method

        protected override void OnMouseMove(MouseEventArgs e)
        {
            if (selecting && textArea != null && TextView != null) {
                e.Handled = true;
                SimpleSegment currentSeg = GetTextLineSegment(e);
                if (currentSeg == SimpleSegment.Invalid)
                    return;
                ExtendSelection(currentSeg);
            }
            base.OnMouseMove(e);
        }