i want encrypt mail password

hey everyone i'm using this method for contact us as u see i'm using my email on this method but problem is password here everyone can see it

 private void SendEMail(string emailid, string subject, string body)
        {
            System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient();
            client.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
            client.EnableSsl = true;
            client.Host = "smtp.gmail.com";
            client.Port = 587;


            System.Net.NetworkCredential credentials = new System.Net.NetworkCredential("xxxx@gmail.com", "password");
            client.UseDefaultCredentials = false;
            client.Credentials = credentials;

            System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage();
            msg.From = new MailAddress("xxxxx@gmail.com");
            msg.To.Add(new MailAddress(emailid));

            msg.Subject = subject;
            msg.IsBodyHtml = true;
            msg.Body = body;

            client.Send(msg);
        }

so how can encrypt or hide password is there any way to make it so securer