Use System. Net. Mail to send emails

Using System;
Using System. Net. Mail;
Using System. Net. Mime;
Using System. Net;
Using System. Collections;
Namespace ConsoleApplication1
{
Class Program
{
Static void Main (string [] args)
{
Try
{
String file = "attach.txt ";
MailMessage message = new MailMessage ("** @ 126.com"," ** @ mail2.sysu.edu.cn "," Hello "," Hello ");
Attachment data = new Attachment (file, MediaTypeNames. Application. Octet );
ContentDisposition disposition = data. ContentDisposition;
Disposition. CreationDate = System. IO. File. GetCreationTime (file );
Disposition. ModificationDate = System. IO. File. GetLastWriteTime (file );
Disposition. ReadDate = System. IO. File. GetLastAccessTime (file );
Message. Attachments. Add (data );
SmtpClient client = new SmtpClient ("smtp.126.com ");
Client. Credentials = new NetworkCredential ("** @ 126.com ","**");
Client. Send (message );
ContentDisposition cd = data. ContentDisposition;
Console. WriteLine ("Content disposition ");
Console. WriteLine (cd. ToString ());
Console. WriteLine ("File {0}", cd. FileName );
Console. WriteLine ("Size {0}", cd. Size );
Console. WriteLine ("Creation {0}", cd. CreationDate );
Console. WriteLine ("Modification {0}", cd. ModificationDate );
Console. WriteLine ("Read {0}", cd. ReadDate );
Console. WriteLine ("Inline {0}", cd. Inline );
Console. WriteLine ("Parameters: {0}", cd. Parameters. Count );
Foreach (DictionaryEntry d in cd. Parameters)
{
Console. WriteLine ("{0 }={ 1}", d. Key, d. Value );
}
Data. Dispose ();
}
Catch (Exception e)
{
Console. WriteLine (e. Message );
}
}
}
}