C# 操作XML，自己用过的代码，可能只有我能看懂

public string WriteXML(string[] values, int flag)
{

//如果flag==0则为第一次运行需要初始化XML文件
if (flag == 0)
{
//生在随机文件名
string dateName = System.DateTime.Now.ToString("yyyyMMddHHmmss");
string newFileName = Session["orgid"].ToString() + "_" + Session["DeptID"].ToString() + "_" + Session["UserID"].ToString() + "_" + dateName;
string PersonalFolder = Server.MapPath(@"~/offline/" + Session["OrgID"].ToString() + "_" + Session["DeptID"].ToString() + "_" + Session["UserID"].ToString() + "/" + DateTime.Now.ToString("yyyy-MM-dd HH_mm_ss"));
if (!Directory.Exists(PersonalFolder))
{
Directory.CreateDirectory(PersonalFolder);
}
//Directory.SetAccessControl(PersonalFolder, System.Security.AccessControl.DirectorySecurity);
string file = PersonalFolder + "\\" + newFileName + ".xml";
Session["PersonalFolder"] = PersonalFolder;
Session["file"] = file;
#region 创建文件
StreamWriter sw = File.CreateText(file);
sw.WriteLine("<?xml version=\"1.0\" encoding=\"utf-8\" ?>");
sw.WriteLine("<ChkQuaran UserID=\"\" UserName=\"\" DeptID=\"\" OrgID=\"\" RoleID=\"\">");
//sw.WriteLine("<ChkInfo>");
sw.WriteLine();
//sw.WriteLine("</ChkInfo>");
sw.WriteLine("</ChkQuaran>");
sw.Close();
sw.Dispose();
#endregion
#region 插入用户信息
XMLDataBase.XMLCommen xmlHelper = new XMLDataBase.XMLCommen(file);
xmlHelper.UpdateAttr("ChkQuaran", "UserID", Session["Userid"].ToString());
xmlHelper.UpdateAttr("ChkQuaran", "UserName", Session["UserName"].ToString());