.net 将字典数据转换成xml 字符串， 以及传参至存储过程后如何取值

1, .net 将字典数据转换成xml 字符串

   Dictionary<string, DateTime> dicUserLocked = new Dictionary<string, DateTime>();    

      if (!dicUserLocked.ContainsKey(model.UserName))
     {
            dicUserLocked.Add(model.UserName, System.DateTime.Now);
     }
     // ....
    dicLockedUsers.ToXml<string, System.DateTime>().ToString()   Dictionary<stri