动态生成圈形+文字的图片

 private Bitmap TextToBitmap(string text)
        {
            Bitmap bmp = null;
            Graphics g;
            StringFormat format = new StringFormat(StringFormatFlags.NoClip);
            //设置图片的宽和高
            bmp = new Bitmap(25, 25);           
            g = Graphics.FromImage(bmp);
            //使用ClearType字体功能
            g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
　　　　　　　//绘制的圆形要在图片范围内
            g.DrawEllipse(new Pen(Color.Red, 1), 1, 1, 20, 20);
            g.DrawString(text, new Font("Arial", 10), Brushes.Black, 2, 4f, format);
            return bmp;
        }

 private void Form1_Load(object sender, EventArgs e)
        {
            Bitmap bmp = TextToBitmap("养");
            bmp.Save(@"[路径]\save.png", ImageFormat.Png);           
        }