Print image full on printer paper in kiosk photo application in C#?

if (string.IsNullOrWhiteSpace(textBox1.Text)) return; // Prevents execution of below statements if filename is not selected.

                PrintDocument pd = new PrintDocument();
              
                PrintController printController = new StandardPrintController();
                pd.PrintController = printController;

                pd.DefaultPageSettings.Margins = new Margins(0, 0, 0, 0);
                pd.PrinterSettings.DefaultPageSettings.Margins = new Margins(0, 0, 0, 0);
                pd.PrintPage += (sndr, args) =>
                {
                    System.Drawing.Image i = System.Drawing.Image.FromFile(textBox1.Text);
                    System.Drawing.Rectangle m = args.MarginBounds;

                    //Logic below maintains Aspect Ratio 
                    if ((double)i.Width / (double)i.Height > (double)m.Width / (double)m.Height) // image is wider
                    {
                        m.Height = (int)((double)i.Height / (double)i.Width * (double)m.Width);
                    }
                    else
                    {
                        m.Width = (int)((double)i.Width / (double)i.Height * (double)m.Height);
                    }

                    //Calculating optimal orientation.
                    pd.DefaultPageSettings.Landscape = m.Height > m.Width;

                    // Putting image in center of page.
                    m.Y = (int)((((System.Drawing.Printing.PrintDocument)(sndr)).DefaultPageSettings.PaperSize.Height - m.Height) / 2);
                    m.X = (int)((((System.Drawing.Printing.PrintDocument)(sndr)).DefaultPageSettings.PaperSize.Width - m.Width) / 2);
                    args.Graphics.DrawImage(i, m);
                };
                pd.Print();