Send E-mail with attached file in asp.net

First of all add one namespace

• using System.Net.Mail

then enter following code . make sure that following code has attached one text file with folder name you have to give you folder name and file name.

");
strbody.Append("
");

string result = SendEMailMessage("test@gmail.com", "test", "test1@gmail.com", strbody.ToString(), "Testing");

if (result.ToString() == "Mail sent successfully")

      ScriptManager.RegisterStartupScript(Page, Page.GetType(), "str", "alert('Mail Sent Successfully.');", true);

else

      ScriptManager.RegisterStartupScript(Page, Page.GetType(), "str", "alert('Mail Sending fail.');", true);

public static string SendEMailAttachment(string EMailFrom, string EMailName, string EMailTo, string EmailBody, string EmailSubject)     {         string SmtpServer = "smtp.gmail.com";         string smtpusername = "yourgmailemailid@gmail.com";         string smtppassword = "password";         string flah = "";         SmtpClient SmtpMail = new SmtpClient();         MailMessage message = new MailMessage();         System.Net.Mail.Attachment attach = new System.Net.Mail.Attachment(System.Web.Hosting.HostingEnvironment.ApplicationPhysicalPath + "OrderText\\Order.txt");         message.Attachments.Add(attach);         message.IsBodyHtml = true;         try         {             SmtpMail.Host = SmtpServer;             SmtpMail.UseDefaultCredentials = false;             SmtpMail.Credentials = new System.Net.NetworkCredential(smtpusername, smtppassword);//Fetching the credentials             MailAddress fromAddress = new MailAddress(EMailFrom, EMailName);// Set the sender address of the mail message             message.From = fromAddress;             message.Sender = fromAddress; // Set the recepient address of the mail message             message.To.Add(EMailTo); // Set the subject of the mail message             message.Subject = EmailSubject; // Set the format of the mail message body as HTML             message.Body = EmailBody;             message.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;             SmtpMail.Send(message);             if (message.Attachments.Count > 0)             {                 attach.Dispose();             }             flah = "Mail sent successfully";             return flah;         }         catch (Exception ex)         {             flah = "Mail could not be sent successfully " + ex.Message;             return flah;         } How to call this mail function    StringBuilder strbody = new StringBuilder(); strbody.Append("your content"); strbody.Append("your content"); string result = SendEMailMessage("test@gmail.com", "test", "test1@gmail.com", strbody.ToString(), "Testing"); if (result.ToString() == "Mail sent successfully")       ScriptManager.RegisterStartupScript(Page, Page.GetType(), "str", "alert('Mail Sent Successfully.');", true); else       ScriptManager.RegisterStartupScript(Page, Page.GetType(), "str", "alert('Mail Sending fail.');", true);