iTextSharp.text.pdf.BaseField.DrawTopFrame C# (CSharp) Метод

        private void DrawTopFrame(PdfAppearance app)
        {
            app.MoveTo(borderWidth, borderWidth);
            app.LineTo(borderWidth, box.Height - borderWidth);
            app.LineTo(box.Width - borderWidth, box.Height - borderWidth);
            app.LineTo(box.Width - 2 * borderWidth, box.Height - 2 * borderWidth);
            app.LineTo(2 * borderWidth, box.Height - 2 * borderWidth);
            app.LineTo(2 * borderWidth, 2 * borderWidth);
            app.LineTo(borderWidth, borderWidth);
            app.Fill();
        }