本文将分享在C#语言的Winform应用中，实现邮件自动发送的代码及案例。邮件自动发送是一项常见的功能需求，我们可以通过在Winform界面中添加相应的控件和代码，来实现自动发送邮件的功能。下面是该功能的代码示例：

'''

using System;

using System.Net;

using System.Net.Mail;

namespace CSharpWinformMail

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

    private void buttonSend_Click(object sender, EventArgs e)
    {
        try
        {
            string senderEmail = textBoxSenderEmail.Text;
            string senderPassword = textBoxSenderPassword.Text;
            string receiverEmail = textBoxReceiverEmail.Text;
            string subject = textBoxSubject.Text;
            string body = textBoxBody.Text;

            SmtpClient smtpClient = new SmtpClient("smtp.server.com", 587);
            smtpClient.UseDefaultCredentials = false;
            smtpClient.Credentials = new NetworkCredential(senderEmail, senderPassword);
            smtpClient.EnableSsl = true;

            MailMessage mailMessage = new MailMessage(senderEmail, receiverEmail, subject, body);
            smtpClient.Send(mailMessage);

            MessageBox.Show("邮件发送成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }
}

}

'''

以上代码可以在C#的Winform项目中使用，传入发件人邮箱、发件人密码、收件人邮箱、邮件主题和邮件内容，然后通过SMTP协议发送邮件。大家可以根据自己的需求进行相应的修改和调整，实现个性化的邮件自动发送功能。