Asp.net mail sending class (with attachment)

Asp tutorial. net mail sending class (with attachment)
Using system;
Using system. collections. generic;
Using system. text;
Using system.net;
Using system.net. mail;
Using system.net. mime;
Namespace windowsformsapplication1
{
Class sendmail
    {
Private mailmessage;
Private smtpclient;
Private string password; // The sender's password.
/// <Summary>
/// The instance of the class after review
/// </Summary>
/// <Param name = "to"> recipient address </param>
/// <Param name = "from"> sender address </param>
/// <Param name = "body"> email body </param>
/// <Param name = "title"> subject of the email </param>
/// <Param name = "password"> Sender password </param>
Public sendmail (string to, string from, string body, string title, string password)
        {
Mailmessage = new mailmessage ();
Mailmessage. to. add ();
Mailmessage. from = new system.net. mail. mailaddress (from );
Mailmessage. subject = title;
Mailmessage. body = body;
Mailmessage. isbodyhtml = true;
Mailmessage. bodyencoding = system. text. encoding. utf8;
Mailmessage. priority = system.net. mail. mailpriority. normal;
This. password = password;
        }
/// <Summary>
/// Add an attachment
/// </Summary>
Public void attachments (string path)
        { 
String [] path = path. split (',');
Attachment data;
Contentdisposition disposition;
For (int I = 0; I <path. length; I ++)
            { 
Data = new attachment (path [I], mediatypenames. application. octet); // instantiate the attachment
Disposition = data. contentdisposition;
Disposition. creationdate = system. io. file. getcreationtime (path [I]); // Obtain the attachment creation date
Disposition. modificationdate = system. io. file. getlastwritetime (path [I]); // Obtain the attachment modification date
Disposition. readdate = system. io. file. getlastaccesstime (path [I]); // Obtain the read date of the attachment
Mailmessage. attachments. add (data); // add it to the attachment.
            } 
        }
/// <Summary>
/// Send mail asynchronously
/// </Summary>
/// <Param name = "completedmethod"> </param>
Public void sendasync (sendcompletedeventhandler completedmethod)
        {
If (mailmessage! = Null)
            {
Smtpclient = new smtpclient ();
Smtpclient. credentials = new system.net. networkcredential (mailmessage. from. address, password); // Set the sender identity ticket
Smtpclient. deliverymethod = system.net. mail. smtpdeliverymethod. network;
Smtpclient. host = "smtp." + mailmessage. from. host;
Smtpclient. sendcompleted + = new sendcompletedeventhandler (completedmethod); // register the event when the asynchronous mail sending is completed
Smtpclient. sendasync (mailmessage, mailmessage. body );
            }
        }
/// <Summary>
/// Send an email
/// </Summary>
Public void send ()
        {
If (mailmessage! = Null)
            {
Smtpclient = new smtpclient ();
Smtpclient. credentials = new system.net. networkcredential (mailmessage. from. address, password); // Set the sender identity ticket
Smtpclient. deliverymethod = system.net. mail. smtpdeliverymethod. network;
Smtpclient. host = "smtp." + mailmessage. from. host;
Smtpclient. send (mailmessage );
            }
        } 
    }
}