在 C# 中单击按钮后发送电子邮件 ASP.net

嗨，我正在尝试在按钮单击 Asp.net 后发送电子邮件。

要向其发送电子邮件的电子邮件将从查询中检索。

        string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
        SqlDataReader reader;
        string sendMessage = "SELECT aspnet_Membership.Email FROM aspnet_Membership join User_Profile on User_Profile.UserId = aspnet_Membership.UserId JOIN Project_List on Project_List.ProfileId = User_Profile.ProfileId WHERE Project_List.ProfileId = 1";
        using (SqlConnection myConnection = new SqlConnection(connectionString))
        {
            myConnection.Open();
            SqlCommand myCommand = new SqlCommand(sendMessage, myConnection);

            ArrayList emailArray = new ArrayList();
            reader = myCommand.ExecuteReader();

            while (reader.Read())
            {
                emailArray.Add(reader["email"]);
            }
            foreach (string email in emailArray)

它没有出现任何错误，也没有收到任何电子邮件

foreach(string email in emailArray)
{
     SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
     smtp.UseDefaultCredentials = false;
     smtp.Credentials = new NetworkCredential("tayyib@gmail.com", "xxxxxxxxx");
     smtp.EnableSsl = true;
     MailMessage msg = new MailMessage("tayyib@gmail.com", email); 
     msg.Subject = "Test1";
     msg.Body = "Test2";
     smtp.Send(msg);
 }