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

        protected override void OnRender(DrawingContext drawingContext)
        {
            TextView textView = this.TextView;
            Size renderSize = this.RenderSize;
            if (textView != null && textView.VisualLinesValid) {
                var foreground = (Brush)GetValue(Control.ForegroundProperty);
                foreach (VisualLine line in textView.VisualLines) {
                    int lineNumber = line.FirstDocumentLine.LineNumber;
                    FormattedText text = new FormattedText(
                        lineNumber.ToString(CultureInfo.CurrentCulture),
                        CultureInfo.CurrentCulture,
                        FlowDirection.LeftToRight,
                        typeface, emSize, foreground
                    );
                    drawingContext.DrawText(text, new Point(renderSize.Width - text.Width,
                                                            line.VisualTop - textView.VerticalOffset));
                }
            }
        }