send mail with attachment

string strSMTPServer = ConfigurationManager.AppSettings["SMTPServer"];
                string strFromAddress = ConfigurationManager.AppSettings["FromAddress"];
                string strUserName = ConfigurationManager.AppSettings["MailCredential_UserName"];
                string strPassword = ConfigurationManager.AppSettings["MailCredential_Password"];
                int intSMTPPort = Convert.ToInt32(ConfigurationManager.AppSettings["SMTPPort"]);
                MailMessage mail = new MailMessage();
                SmtpClient SmtpServer = new SmtpClient(strSMTPServer);
                if (fileResume.HasFile == true)
                {
                    mail.Attachments.Add(new Attachment(fileResume.PostedFile.InputStream, fileResume.PostedFile.FileName));
                    mail.From = new MailAddress(strFromAddress);
                    mail.To.Add(ConfigurationManager.AppSettings["MailToAddress"]);
                    String strAppliedFor=Request.QueryString["jobid"]!=null?Request.QueryString["jobid"]:"General";
                    mail.Subject = "Applied For " + ddlApplyOne.SelectedValue;
                    mail.IsBodyHtml = true;
                    StringBuilder mailBody = new StringBuilder();
                    mailBody.AppendFormat("<div style='width:50px;backround-color:Green'><table border='10' bordercolor='red' cellpadding='10' cellspacing='10'  align='center'>");
                    mailBody.AppendFormat("<tr><td colspan='2' align='center'><h1>Application for the post of {0}</h1></td></tr>", ddlApply.SelectedValue);
                    mailBody.AppendFormat("<tr><td>Name of the Candidate:</td><td>{0}</td></tr>",txtName.Text);
                    mailBody.AppendFormat("<tr><td>EmailID:</td><td>{0}</td></tr>",txtEmail.Text);
                    mailBody.AppendFormat("<tr><td>Contact Ph:</td><td>{0}</td></tr>",txtContact.Text);
                    mailBody.AppendFormat("<tr><td>Educational Qualification:</td><td>{0}</td></tr>",txtEduQu.Text);
                    mailBody.AppendFormat("<tr><td>Technical Skils:</td><td>{0}</td></tr>",txtSkills.Text);
                    mailBody.AppendFormat("<tr><td>Work Experience:</td><td>{0}</td></tr>", ddlExp.SelectedValue);
                    mailBody.AppendFormat("<tr><td>Current Working Status:</td><td>{0}</td></tr>", txtWorkStat.Text);
                    mailBody.AppendFormat("</table></div>");
                    mail.Body = mailBody.ToString();
                    SmtpServer.Port = intSMTPPort;
                    SmtpServer.Credentials = new System.Net.NetworkCredential(strUserName, strPassword);
                    SmtpServer.EnableSsl = true;
                    SmtpServer.Send(mail);
                    txtEmail.Text = "";
                    txtName.Text = "";
                    txtSkills.Text = "";
                    txtWorkStat.Text = "";
                    txtContact.Text="";
                    txtEduQu.Text="";
                    txtWorkStat.Text="";
                    ddlApply.SelectedIndex=0;
                    ddlExp.SelectedIndex=0;
                    lblError.Text = "";
                    ScriptManager.RegisterStartupScript(this,this.GetType(),"MessageBox","alert('Your details are updated to our system. We will get back to you soon..Thank you');",true);