/// <summary>增加接收者信息</summary>
        /// <param name="receiverId">接收者标识</param>
        /// <param name="isRead">是否已读</param>
        /// <param name="status">状态</param>
        /// <param name="finishTime">完成时间</param>
        public void AddReceiver(string receiverId, bool isRead, int status, DateTime finishTime)
        {
            TaskWorkReceiverInfo receiver = new TaskWorkReceiverInfo();

            receiver.ReceiverId = receiverId;
            receiver.Status     = status;
            receiver.IsRead     = isRead;
            receiver.FinishTime = finishTime;

            this.ReceiverGroup.Add(receiver);
        }
        // -------------------------------------------------------
        // Xml 元素的导入和导出
        // -------------------------------------------------------

        #region 函数:Deserialize(XmlElement element)
        /// <summary>根据Xml元素加载对象</summary>
        /// <param name="element">Xml元素</param>
        public void Deserialize(XmlElement element)
        {
            StringBuilder outString = new StringBuilder();

            this.ApplicationId = element.SelectSingleNode("applicationId").InnerText;
            this.TaskCode      = element.SelectSingleNode("taskCode").InnerText;

            // 设置任务标识
            this.Id = TasksContext.Instance.TaskWorkService.GetIdsByTaskCodes(this.ApplicationId, this.TaskCode);

            if (string.IsNullOrEmpty(this.Id))
            {
                this.Id = StringHelper.ToGuid();
            }

            this.Type    = element.SelectSingleNode("type").InnerText;
            this.Title   = element.SelectSingleNode("title").InnerText;
            this.Content = element.SelectSingleNode("content").InnerText;
            this.Tags    = element.SelectSingleNode("tags").InnerText;

            // 设置发送人

            IAccountInfo account = null;

            account = MembershipManagement.Instance.AccountService[element.SelectSingleNode("sender").InnerText];

            this.SenderId = (account == null) ? element.SelectSingleNode("sender").InnerText + "(unkown)" : account.Id;

            // 设置接收人

            outString.Append("<receiver>");

            TaskWorkReceiverInfo item = null;

            string[] keys = element.SelectSingleNode("receiver").InnerText.Split(',');

            string[] temp;

            foreach (string key in keys)
            {
                if (!string.IsNullOrEmpty(key) && key.Contains("#"))
                {
                    temp = key.Split('#');

                    item        = new TaskWorkReceiverInfo();
                    item.TaskId = this.Id;
                    item.Status = Convert.ToInt32(temp[0]);

                    account = MembershipManagement.Instance.AccountService[temp[1]];

                    item.ReceiverId = (account == null) ? temp[1] : account.Id;

                    // 1 代表任务完 , 插入任务完成时间.
                    if (item.Status == 1)
                    {
                        item.FinishTime = Convert.ToDateTime(temp[2]);
                    }

                    this.ReceiverGroup.Add(item);
                }
            }

            this.CreateDate = Convert.ToDateTime(element.SelectSingleNode("createDate").InnerText);
        }