How to make a "Reset Password"? - asp.net

Question

How can I make this code send a new generated password or the user its old password?
I figured out how to let the code send a email! The sender is not the problem but the receiver is. Where EmailAdresNaar must be replaced with an email that someone puts into a text box or something.
public void SendEmail()
{
string emailAdresVan = "invoerenSVP";
string password = "invoerenSVP";
MailMessage msg = new MailMessage();
msg.From = new MailAddress(emailAdresVan);
msg.To.Add(new MailAddress(EmailAdresNaar));
msg.Subject = Onderwerp;
msg.Body = Bericht;
msg.IsBodyHtml = true;
SmtpClient smtpClient = new SmtpClient("smtp.gmail.com", 587);
NetworkCredential loginInfo = new NetworkCredential(emailAdresVan, password);
smtpClient.EnableSsl = true;
smtpClient.UseDefaultCredentials = true;
smtpClient.Credentials = loginInfo;
smtpClient.Send(msg);
}
}
}

Answer 1

Put data you need like this:
msg.From = new MailAddress("support#yoursite.com");
msg.To.Add(new MailAddress(UserEmailTextBox.Text));
msg.Subject = "New Password";
msg.Body = GenerateNewPassword();
and example of method GenerateNewPassword(), but you should make it much more complex to return randomly generated new password (you need to google for different variations of implementation):
public string GenerateNewPassword()
{
string new_pass = "";
// generate new password
return new_pass;
}
Ideally, you should make another page like PasswordsReset.aspx, and send to user link to this page with some kind of GUID, where user can create new password by himself.