请教个基础问题

[bleachj8]

WPF的Image控件有个Source方法我想请教下,winform的PicturBox有什么方法能代替Image控件的Source方法那 如果没有有什么办法用其他类代替那, 我有个项目是把图像数据保存到 JpegBitmapEncoder的这个方法里 encoder.Frames.Add(BitmapFrame.Create(BitmapFrame.Create(image1.Source as BitmapSource))); WPF的Image的SOURCE方法就行,但是我想用winform实现 不知道怎么改 求指教

   pictureBox1.ImageLocation.= BitmapSource.Create(data.Width, data.Height, 96, 96, PixelFormats.Bgr32, null,   coloredFrame, data.Width * PixelFormats.Bgr32.BitsPerPixel / 8);
                encoder.Frames.Add(BitmapFrame.Create(BitmapFrame.Create(pictureBox1.ImageLocation as BitmapSource)));
                using (MemoryStream ms = new MemoryStream())
                {

                    encoder.Save(ms);

                }

这么写会抱错The type 'System.Windows.Freezable' is defined in an assembly that is not referenced. You must add a reference to assembly 'WindowsBase, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.

[bleachj8]

error CS0029: Cannot implicitly convert type 'System.Windows.Media.Imaging.BitmapSource' to 'string'