code to send Mail From Web Application using c sharp

 using System.Web.Mail;  
 using System;  
 public class MailSender  
 {  
 public static bool SendEmail(  
 string pGmailEmail,  
 string pGmailPassword,  
 string pTo,  
 string pSubject,  
 string pBody,  
 MailFormat pFormat,  
 string pAttachmentPath )  
 {  
 MailMessage myMail = new MailMessage();  
 myMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserver","smtp.gmail.com");  
 myMail.Fields.Add  
 ("http://schemas.microsoft.com/cdo/configuration/smtpserverport","465");  
 myMail.Fields.Add  
 ("http://schemas.microsoft.com/cdo/configuration/sendusing","2");  
 myMail.Fields.Add  
 ("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate","1");  
 //Use 0 for anonymous  
 myMail.Fields.Add  
 ("http://schemas.microsoft.com/cdo/configuration/sendusername",pGmailEmail);  
 myMail.Fields.Add  
 ("http://schemas.microsoft.com/cdo/configuration/sendpassword",pGmailPassword);  
 myMail.Fields.Add  
 ("http://schemas.microsoft.com/cdo/configuration/smtpusessl","true");  
 myMail.Priority = MailPriority.High;  
 myMail.From = pGmailEmail;  
 myMail.To = pTo;  
 myMail.Subject = pSubject;  
 myMail.BodyFormat = pFormat;  
 myMail.Body = pBody;  
 //pAttachmentPath =  
 if (pAttachmentPath.Trim() != "")  
 {  
 MailAttachment MyAttachment =  
 new MailAttachment(pAttachmentPath);  
 myMail.Attachments.Add(MyAttachment);  
 myMail.Priority = MailPriority.High;  
 }  
 SmtpMail.SmtpServer = "smtp.gmail.com:465";  
 System.Web.Mail .SmtpMail.Send(myMail);  
 return true;  
 }  
 }  
 using System;  
 public partial class _Default : System.Web.UI.Page  
 {  
 protected void Page_Load(object sender, EventArgs e)  
 {  
 }  
 protected void btnSubmit_Click(object sender, EventArgs e)  
 {  
 string Username = txtUserName.Text.Trim();  
 string Password = txtPassword.Text.Trim();  
 string To = txtTo.Text.Trim();  
 string Subject = txtSubject.Text.Trim();  
 string Body = HtmlEditor1.Text;  
 bool flag1;  
 if (Username != "" || Password != "" || Subject != "" || Body != "" || To != "")  
 {  
 flag1 = MailSender.SendEmail(Username, Password, To, Subject, Body, System.Web.Mail.MailFormat.Html, "");  
 if (flag1)  
 {  
 Response.Write("Mail Sent Successfully.");  
 }  
 }  
 else  
 {  
 Response.Write("Please Insert all Information.");  
 }  
 }  
 protected void btnCancel_Click(object sender, EventArgs e)  
 {  
 txtPassword.Text = "";  
 txtSubject.Text = "";  
 txtTo.Text = "";  
 txtUserName.Text = "";  
 }  
 }