/// <summary>
 /// 构造函数
 /// </summary>
 /// <param name="stmpserver">SMTP服务器</param>
 /// <param name="nickname">发送者昵称</param>
 /// <param name="mailsubject">标题</param>
 /// <param name="mailbody">正文</param>
 /// <param name="mailTolist">收件人</param>
 /// <param name="mailCclist">抄送</param>
 /// <param name="attachmentsPathlist">附件</param>
 /// <param name="isbodyhtml">正文是否是html格式</param>
 /// <param name="mailPriority">优先级别</param>
 public SmtpClientManager(SmtpServer stmpserver, string nickname, string mailsubject, string mailbody, string[] mailTolist, string[] mailCclist, string[] attachmentsPathlist, bool isbodyhtml, MailPriority mailPriority)
 {
     StmpServer          = stmpserver;
     NickName            = nickname;
     MailSubject         = mailsubject;
     MailBody            = mailbody;
     MailToList          = mailTolist;
     MailCcList          = mailCclist;
     AttachmentsPathList = attachmentsPathlist;
     IsbodyHtml          = isbodyhtml;
     Priority            = mailPriority;
 }
 /// <summary>
 /// 构造函数
 /// </summary>
 /// <param name="stmpserver">SMTP服务器</param>
 /// <param name="nickname">发送者昵称</param>
 /// <param name="mailsubject">标题</param>
 /// <param name="mailbody">正文</param>
 /// <param name="mailTolist">收件人</param>
 /// <param name="attachmentsPathlist">附件</param>
 public SmtpClientManager(SmtpServer stmpserver, string nickname, string mailsubject, string mailbody, string[] mailTolist, string[] attachmentsPathlist)
     : this(stmpserver, nickname, mailsubject, mailbody, mailTolist, null, attachmentsPathlist, true, MailPriority.Normal)
 {
 }
 /// <summary>
 /// 构造函数
 /// </summary>
 /// <param name="stmpserver">SMTP服务器</param>
 /// <param name="nickname">发送者昵称</param>
 /// <param name="mailsubject">标题</param>
 /// <param name="mailbody">正文</param>
 /// <param name="mailTolist">收件人</param>
 /// <param name="mailPriority">优先级别</param>
 public SmtpClientManager(SmtpServer stmpserver, string nickname, string mailsubject, string mailbody, string[] mailTolist, MailPriority mailPriority)
     : this(stmpserver, nickname, mailsubject, mailbody, mailTolist, null, null, true, mailPriority)
 {
 }