C#发送邮件

/// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="fromAddr">发件人邮箱</param>
        /// <param name="displayName_from">发件人名称</param>
        /// <param name="toAddr">收件人邮箱</param>
        /// <param name="displayName_to">收件人名称</param>
        /// <param name="subject">邮件主题</param>
        /// <param name="body">邮件正文</param>
        /// <param name="file">附件</param>
        /// <param name="SMTPHost">发送送邮件服务器</param>
        /// <param name="pwd">发件人密码</param>
        /// <returns>发送成功返回true，否则返回false</returns>
        public static bool send(string fromAddr,string displayName_from, string toAddr,string displayName_to, string subject, string body, string file, string SMTPHost, string pwd)
        {
            MailAddress from = new MailAddress(fromAddr, displayName_from);
            MailAddress to = new MailAddress(toAddr, displayName_to);
            MailMessage oMail = new MailMessage(from, to);
            //// 添加附件
            if (file != null && file.Trim().Length != 0)
            {
                oMail.Attachments.Add(new Attachment(file));
            }
            oMail.Subject = subject;
            oMail.Body = body;
            ////邮件格式
            oMail.IsBodyHtml = false;
            oMail.BodyEncoding = System.Text.Encoding.GetEncoding("UTF-8");
            ////设置邮件的优先级为高
            oMail.Priority = MailPriority.High;
            SmtpClient client = new SmtpClient();
            client.Host = SMTPHost;
            client.Credentials = new NetworkCredential(fromAddr, pwd);
            client.DeliveryMethod = SmtpDeliveryMethod.Network;
            try
            {
                client.Send(oMail);
                return true;
            }
            catch
            {
                return false;
            }
            finally
            {
                oMail.Dispose();
            }
        }