How can I customize border styles in the PdfLightTable?

//Creates a new PDF document.
PdfDocument doc = new PdfDocument();
//Adds a page.
PdfPage page = doc.Pages.Add();
//Acquires page's graphics.
PdfGraphics graphics = page.Graphics;
//Declares the PdfLightTable.
PdfLightTable pdfLightTable = new PdfLightTable();
//Customizes the color of the table border.
pdfLightTable.Style.BorderPen = new PdfPen(new PdfColor(168, 189, 238), 0.5F);
//Sets the DataSourceType as Direct.
pdfLightTable.DataSourceType = PdfLightTableDataSourceType.TableDirect;
//Creates columns.
pdfLightTable.Columns.Add(new PdfColumn("Roll Number"));
pdfLightTable.Columns.Add(new PdfColumn("Name"));
pdfLightTable.Columns.Add(new PdfColumn("Class"));
//Adds rows.
pdfLightTable.Rows.Add(new object[] { "111", "Maxim", "III" });
//Draws the PdfLightTable.
pdfLightTable.Draw(page, PointF.Empty);
//Saves the document.
doc.Save("Sample.pdf");
doc.Close(true);