public static void SendMail(string Host, int Port, string strUserName, string strPassword, string strFromName, string strFromEmail,
        string strToName, string strToEmail, string strHeader, string strMessage, bool bAuthenticated)
        {
            if (strToName.Length == 0)
                strToName = strToEmail;
            if (strFromName.Length == 0)
                strFromName = strFromEmail;
            System.Net.Mail.MailMessage Mail = new System.Net.Mail.MailMessage();
            Mail.
                //System.Web.Mail.MailMessage Mail = new System.Web.Mail.MailMessage();
            Mail.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserver"] = Host;
            Mail.Fields["http://schemas.microsoft.com/cdo/configuration/sendusing"] = 2;

            Mail.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserverport"] = Port.ToString();
            if (bAuthenticated)
            {
                Mail.Fields["http://schemas.microsoft.com/cdo/configuration/smtpusessl"] = "true";
                Mail.Fields["http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"] = 1;
                Mail.Fields["http://schemas.microsoft.com/cdo/configuration/sendusername"] = strUserName;
                Mail.Fields["http://schemas.microsoft.com/cdo/configuration/sendpassword"] = strPassword;
            }
            Mail.To = strToEmail;
            Mail.From = strFromEmail;
            Mail.Subject = strHeader;
            Mail.Body = strMessage;
            Mail.BodyFormat = System.Web.Mail.MailFormat.Html;

            System.Web.Mail.SmtpMail.SmtpServer = Host;
            System.Web.Mail.SmtpMail.Send(Mail);
        }

            SendMail("smtp.gmail.com",
                465,
                "danasegarane@gmail.com",
                "YourGmail Password",
                "Dana",
                "danasegarane@gmail.com",
                "Danasegarane",
                "danasegarane@gmail.com",
                "Hi Dana ",
                "Hello How are u !",
                true);