C#中发送邮件

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net.Mail;
using System.Net;

namespace windows
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {

            Send("likunran@xxoo.com", "likunran@xxoo.com", "nihao", "ni hao", "xxx", "xxx", "mail.xxoo.com");
        }

        /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="to">收件人邮件地址</param>
        /// <param name="from">发件人邮件地址</param>
        /// <param name="subject">邮件主题</param>
        /// <param name="body">邮件内容</param>
        /// <param name="username">登录smtp主机时用到的用户名,注意是邮件地址'@'以前的部分</param>
        /// <param name="password">登录smtp主机时用到的用户密码</param>
        /// <param name="smtpHost">发送邮件用到的smtp主机</param>
        public void Send(string to, string from, string subject, string body, string userName, string password, string smtpHost)
        {
            MailAddress from1= new MailAddress(from);
            MailAddress to1 = new MailAddress(to);
            MailMessage message = new MailMessage(from, to);
            message.Subject = subject;//设置邮件主题
            message.IsBodyHtml = true;//设置邮件正文为html格式
            message.Body = body;//设置邮件内容
            SmtpClient client = new SmtpClient(smtpHost);
            //设置发送邮件身份验证方式
            //注意如果发件人地址是abc@def.com，则用户名是abc而不是abc@def.com
            client.Credentials = new NetworkCredential(userName, password);
            client.Send(message);
        }
    
    }

    }