代码是
  Font font = new Font("Arial", 20, (FontStyle.Bold));
           Rectangle rt = new Rectangle(0, 0, image.Width, image.Height);
           System.Windows.Media.LinearGradientBrush brush = new System.Windows.Media.LinearGradientBrush(rt, Color.Blue, Color.DarkRed, 3, true);
           g.DrawString(strValidCode, font, brush, 5, 2);
           g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);
            ms = new ();
           image.Save(ms, ImageFormat.Gif);
           context.Response.ClearContent();
           context.Response.ContentType = "image/gif";
           context.Response.BinaryWrite(ms.ToArray);
报错误    1    “System.Windows.Media.LinearGradientBrush”不包含采用“5”参数的构造函数     

谢谢了！急等！！代码是
  Font font = new Font("Arial", 20, (FontStyle.Bold));
           Rectangle rt = new Rectangle(0, 0, image.Width, image.Height);
           System.Windows.Media.LinearGradientBrush brush = new System.Windows.Media.LinearGradientBrush(rt, Color.Blue, Color.DarkRed, 3, true);
           g.DrawString(strValidCode, font, brush, 5, 2);
           g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);
            ms = new ();
           image.Save(ms, ImageFormat.Gif);
           context.Response.ClearContent();
           context.Response.ContentType = "image/gif";
           context.Response.BinaryWrite(ms.ToArray);
报错误    1    “System.Windows.Media.LinearGradientBrush”不包含采用“5”参数的构造函数     

谢谢了！急等！！

不明白啊，这个类是做什么的啊

引用名是不是弄错了啊
System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(rt, Color.Blue, Color.DarkRed, 3, true);