c# - 为什么我不能在Image类型中使用FromStream类型？

我已经引用了System.Drawing但我无法在代码中使用FromStream（...），而且我从VS中收到此错误，类型Image中不存在类型名称FromStream

寻求更多帮助

           if (Resualt[0].ProductImage != null)
        {
            byte[] ImageArray = (byte[])Resualt[0].ProductImage;
            MemoryStream stream = new MemoryStream();

            stream.Write(ImageArray, 0, ImageArray.Length);

            System.Drawing.Image Img = System.Drawing.Image.FromStream(stream);

            BitmapImage Bi = new BitmapImage();
            Bi.BeginInit();

            MemoryStream ms = new MemoryStream();
            Img.Save(ms , System.Drawing.Imaging.ImageFormat.Bmp);
            ms.Seek(0,SeekOrigin.Begin);
            Bi.StreamSource = ms;
            Bi.EndInit();
            ImgProduct.Source = Bi;

        }