在图像上增长文字 C#

using (Image i = Image.FromFile(inputPath))
    {
    using (Graphics g = Graphics.FromImage(i)) { g.DrawString("John", Font, Brushes.Black, new PointF(fX, fY1)); g.DrawString("2018-10-01", Font, Brushes.Black, new PointF(fX, fY2)); } i.Save(outputPath, ImageFormat.Png); }