MailMessage mail = new MailMessage();



        //set the addresses

        mail.From = new MailAddress("hadmin@mydomain.net.com");

        mail.To.Add("akhbari65@gmail.com");



        //set the content

        mail.Subject = "This is an email";



        //first we create the Plain Text part

        AlternateView plainView = AlternateView.CreateAlternateViewFromString("This is my plain text content, viewable by those clients that don't support html", null, "text/plain");



        //then we create the Html part

        //to embed images, we need to use the prefix 'cid' in the img src value

        //the cid value will map to the Content-Id of a Linked resource.

        //thus <img src='cid:companylogo'> will map to a LinkedResource with a ContentId of 'companylogo'

        AlternateView htmlView = AlternateView.CreateAlternateViewFromString("Here is an embedded image.<img src=cid:companylogo>", null, "text/html");



        //create the LinkedResource (embedded image)

        LinkedResource logo = new LinkedResource("http://www.asp.net/App_Themes/Standard/i/logo.png");

کسی میتونه بگه که مشکل از کجاست؟

به خط آخر که میرسم error میده.