// 打開圖片文件，利用該圖片構造一個文件流
    FileStream fs = new FileStream("../../001.jpg",FileMode.Open);
    // 使用文件流構造一個二進制讀取器將基元數據讀作二進制值
    BinaryReader br = new BinaryReader(fs);

    XmlTextWriter xmlTxtWt = new XmlTextWriter(fileName,Encoding.UTF8);
    //輸出設置 代碼縮進
    xmlTxtWt.Formatting = Formatting.Indented;
    //   xmlTxtWt.Indentation = 4;

    //書寫聲明
    xmlTxtWt.WriteStartDocument();
    xmlTxtWt.WriteStartElement("picture","ContactDetails","http://www.deltabis.com/Contact");//定義命名空間
    xmlTxtWt.WriteStartElement("image");            //定義節點
    xmlTxtWt.WriteAttributeString("imageName","002.jpg");        //添加圖片屬性

    byte[] base64buffer = new byte[bytesToRead];          //開辟緩沖區
    do
    {
     readByte = br.Read(base64buffer,0,bytesToRead);      //將數據讀入字節數組
     xmlTxtWt.WriteBase64(base64buffer,0,readByte);       //將數組中二進制值編碼為Base64并寫出到XML文件

    }while(bytesToRead <= readByte);

    xmlTxtWt.WriteEndElement();
    xmlTxtWt.WriteEndElement();
    xmlTxtWt.WriteEndDocument();

//    xmlTxtWt.Flush();
    xmlTxtWt.Close();

    MessageBox.Show("讀寫結束！");

    //   this.textBox1.Text = ReadXml(fileName);
   }
   catch(Exception ex)
   {
    MessageBox.Show(ex.ToString());
   }