error in code

[srinivaskr]

using System;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Xml.Linq;
using System.Web.Mail;
using System.Net.Mail;

[WebService(Namespace = "http://MailServiceSample/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[system.ComponentModel.ToolboxItem(false)]
[system.Web.Script.Services.ScriptService]
public class SentEmail : System.Web.Services.WebService
   {
       [WebMethod]
       public string Sending_Email(string strEmailAddrFrom,string[] strEmailAddrTo, int intTotalEmailTo, string strAttachement)
       {
           EmailAlert NewMail=new EmailAlert();
           return NewMail.EmailSent(strEmailAddrFrom,strEmailAddrTo, intTotalEmailTo, strAttachement);
       }
public string EmailSent(string strEmailAddrFrom, 
string [] strEmailAddrTo, int intTotalEmailTo, string strAttachement)
       {
           string strSent= " ";
           try
           {
               System.Net.Mail.MailMessage myMailMessage = new System.Net.Mail.MailMessage();
               myMailMessage.From = new MailAddress(strEmailAddrFrom, "Admin");
               myMailMessage.Subject = "Error On Optimizer Program";
               myMailMessage.Body = "Error On Optimizer Program.Please check the detail from the attachment";
               myMailMessage.IsBodyHtml = true;
               myMailMessage.Priority = System.Net.Mail.MailPriority.High;
               for (int NumberOfEmails = 0; NumberOfEmails < intTotalEmailTo; NumberOfEmails++)
               {
                   myMailMessage.To.Add(new MailAddress(strEmailAddrTo[NumberOfEmails]));
               }
               if (strAttachement != "" || strAttachement != null)
               {
                   Attachment att = new Attachment(strAttachement);
                   myMailMessage.Attachments.Add(att);
               }
               SmtpClient myMailClient = new SmtpClient();
               myMailClient.Host = "www.mymailhost.net";
               myMailClient.Port = 25;
               myMailClient.DeliveryMethod = SmtpDeliveryMethod.Network;
               object userState = myMailMessage;
               try
               {
                   Console.WriteLine("Mail Sending In progress");
                   myMailClient.Send(myMailMessage);
               }
               catch (System.Net.Mail.SmtpException ex)
               {
                   Console.WriteLine(ex.Message, "Send Mail Error");
                   strSent = strSent + ex.Message;
               }
               myMailMessage.Dispose();
               strSent = "Mail Sent !!";
           }
           catch (System.Net.Mail.SmtpException exSmtp)
           {
               Console.WriteLine("Exception occurred:" + 
		exSmtp.Message, "SMTP Exception Error");
               strSent = strSent + "Exception occurred:" + exSmtp.Message;
           }
           catch (System.Exception exGen)
           {
               Console.WriteLine("Exception occurred:" + 
		exGen.Message, "General Exception Error");
               strSent = strSent + "Exception occurred:" + exGen.Message;
           }
           return strSent;
       } 
}

 

the above code is returning error in line EmailAlert NewMail=new EmailAlert(); it says missing directive or assembly reference for EmailAlert. please help me resolve this problem.

[PlausiblyDamp]

Where is the class EmailAlert defined?