How to configure the parameters in System.Net.Mail and send email?

using System.Net.Mail;
public void SendMailNow(string from, string to, string title, string content)
        {
            SmtpClient smtp = new SmtpClient(Host);
            if (IsUserCredentials)
            {
                smtp.UseDefaultCredentials = true;
                smtp.Credentials = Credential;
            }
            smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
            MailMessage msg = new MailMessage(from, to, title, content);
            msg.IsBodyHtml = true;
            msg.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
            msg.BodyEncoding = Encoding.GetEncoding(950); //936 - simplified chinese
            msg.SubjectEncoding = Encoding.GetEncoding(950); //950 - traditional chinese
            smtp.Send(msg);
        }
 
public const string SmtpClientHostFrom = "a@test.com";
public const string SmtpClientHost = "smtp.test.com";
public const string SmtpClientIsUserCredentials = "true";
public const string SmtpClientIsOnlyForLocUser = "false";
public const string SmtpClientCredentialAccount = "admin@test.com";
public const string SmtpClientCredentialPassword = "1234";

                                              

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public void SendMail(string to, string title, string content)   
        {   
            MailMessage msg = new MailMessage();   
            msg.From = new MailAddress("me@mycompany.com","My Company Name");   
            msg.To.Add(to);   
            msg.Subject = title;   
            msg.Body = content;   
            msg.IsBodyHtml = true;   
            msg.Priority = MailPriority.Normal;   
            msg.ReplyTo = new MailAddress("me@mycompany.com");   
            msg.Headers.Add("Disposition-Notification-To", "me@mycompany.com");   
            msg.SubjectEncoding = Encoding.GetEncoding(950);   
            msg.BodyEncoding = Encoding.GetEncoding(950);   
            msg.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;   
            SmtpClient smtp = new SmtpClient(smtp.sample.com);   
            smtp.Credentials = new NetworkCredential("testusr", "testpwd");   
            smtp.Send(msg);   
}   
                                              

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