思路：将文字生成图片，再加载此图片伸缩至需要大小。

首先要获取文字的实际大小。宽度高度，再通过图片缩放就OK了

public static void DrawText()        {            Font f = new Font("Aris", 15, FontStyle.Italic | FontStyle.Strikeout);            string s = "我的测试";            Bitmap b = new Bitmap(1, 1);            Graphics g = Graphics.FromImage(b);            var sf = g.MeasureString(s, f);            Bitmap b1 = new Bitmap(Convert.ToInt32(sf.Width), Convert.ToInt32(sf.Height));                        Graphics g1 = Graphics.FromImage(b1);            g1.Clear(Color.White);                        RectangleF rf = new RectangleF(0, 0, sf.Width, sf.Height);            g1.DrawString(s, f, Brushes.Red, rf);            System.IO.MemoryStream ms = new System.IO.MemoryStream();            b1.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);                        Graphics g2 = Graphics.FromImage(bmap);            g2.TranslateTransform(10, 10);            g2.RotateTransform(30);            g2.TranslateTransform(-10, -10);            g2.DrawImage(Image.FromStream(ms), new Rectangle(10, 10, 200, 200));            g2.ResetTransform();            bmap.Save(AppDomain.CurrentDomain.BaseDirectory + "123.jpg");            ms.Dispose();        }