c# 图片XML序列化与反序列化

var xmlDoc = new XmlDocument();
            xmlDoc.Load(@"C:Users*Desktop*.xml");
            var node = xmlDoc.SelectNodes("root/block")[0].ChildNodes[3];
            var cdata = node.FirstChild as XmlCDataSection;
            var strImage = cdata.Value;
            var ms = new MemoryStream(System.Convert.FromBase64String(strImage));
            Image returnImage = Image.FromStream(ms);
            pictureBox1.Image = returnImage;

Image myImage = xxxxx;
System.IO.MemoryStream ms = new System.IO.MemoryStream();
myImage.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);  
result = System.Convert.ToBase64String(ms.ToArray());

var itemNode = xmlDoc.CreateNode(XmlNodeType.Element, "MyImage", null);
itemNode.AppendChild(xmlDoc.CreateCDataSection(result));