ASP.NET 2.0发送邮件

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections.Generic;
using System.Text;
using System.Net.Mail;
/// <summary>
/// Class1 的摘要说明
/// </summary>
///
namespace WebSite.SendMail
{
    public class MailClass
    {
        static string strHost = string.Empty;
        static string strAccount = string.Empty;
        static string strPwd=string.Empty;
        static string strFrom = string.Empty;
        public static string mailHelloWord()
        {
            strHost = "smtp.163.com";
            strAccount = "chinahgf";
            strPwd = "123456";
            strFrom = " chinahgf@163.com ";
            return sendMail(" chinah_g_f@yahoo.com.cn ", "这是一封测试邮件哦", "你好,我是无名,这是我开发的一个邮件程序,看是否能收到!谢谢!");
        }
        static string sendMail(string to, string title, string content)
        {
            SmtpClient _smtpClient = new SmtpClient();
            _smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
            _smtpClient.Host = strHost;
            _smtpClient.Credentials = new System.Net.NetworkCredential(strAccount, strPwd);
            MailMessage _mailMessage = new MailMessage(strFrom, to);
            _mailMessage.Subject = title;
            _mailMessage.Body = content;
            _mailMessage.BodyEncoding = System.Text.Encoding.UTF8;
            _mailMessage.IsBodyHtml = true;
            _mailMessage.Priority = MailPriority.High;
            try
            {
                _smtpClient.Send(_mailMessage);
                return "发送成功";
            }
            catch(Exception ex)
            {
                return ex.Message;
            }
        }

        public Class1()
        {
        }
    }
}