sending verification mail during registration

using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Net;
using System.Net.Mail;
using System.Net.Mime;
using System.Threading;
using System.ComponentModel;
 
namespace randompwdgeneration
{
	public partial class _Default : System.Web.UI.Page
	{
		protected void Page_Load(object sender, EventArgs e)
		{
		}
		public string GeneratePassword()
		{
			//Since I'm big on security, I wanted to generate passwords that contained numbers, letters and special
			//characters - and not easily hacked.
			 
			//I started with creating three string variables.
			//This one tells you how many characters the string will contain.
			string PasswordLength = "12";
			//This one, is empty for now - but will ultimately hold the finised randomly generated password
			string NewPassword = "";
			 
			//This one tells you which characters are allowed in this new password
			string allowedChars = "";
			allowedChars = "1,2,3,4,5,6,7,8,9,0";
			allowedChars += "A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,";
			allowedChars += "a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,";
			allowedChars += "~,!,@,#,$,%,^,&,*,+,?";
			 
			//Then working with an array...
			 
			char[] sep = { ',' };
			string[] arr = allowedChars.Split(sep);
			 
			string IDString = "";
			string temp = "";
			 
			//utilize the "random" class
			Random rand = new Random();
			 
			//and lastly - loop through the generation process...
			for (int i = 0; i < Convert.ToInt32(PasswordLength); i++)
			{
				temp = arr[rand.Next(0, arr.Length)];
				IDString += temp;
				NewPassword = IDString;
				 
				//For Testing purposes, I used a label on the front end to show me the generated password.
				//lblProduct.Text = IDString;
			}
		 
			return NewPassword;
		}
		 
		protected void Button1_Click(object sender, EventArgs e)
		{
			{
				//create your variables
				string strSubject = "Your Password Has Been Reset";
				string strFromEmail = "admin@i1tech.com";
				string strFromName = "Administrator";
				string strNewPassword = GeneratePassword().ToString(); //This is where you'd call the new password string.
				try
				{
					//create the new mail message[/color]
					MailMessage MailMsg = new MailMessage();
					//cretate the FROM[/color]
					MailMsg.From = new MailAddress(strFromEmail);
					//create the subject[/color]
					MailMsg.Subject = strSubject;
					//We obviously need to create the TO - otherwise it goes nowhere.
					MailMsg.To.Add(TextBox1.Text); //assuming there was a form to fill out and they put the right email address in.
					MailMsg.IsBodyHtml = true; //I decided to make it html - so I could format the text.
					MailMsg.Body = "The following email was sent to you by " + strFromName + ".";
					MailMsg.Body += "Apparently, you needed your password reset - So here it is: ";
					MailMsg.Body += "New Password " + strNewPassword + "";
					MailMsg.Body += "If you didn't request this, then - oops, you might wanna think about changing it, now. ";
					MailMsg.Body += "Click the following link to change your password:";
					MailMsg.Body += "admin@i1tech.com";
					//utilizing SMTP (simple mail transfer protocol)
					SmtpClient smtp = new SmtpClient();
					smtp.Host = "webmail.i1tech.com"; //if my domain had a way of sending out emails.
					 
					SmtpClient client = new SmtpClient();
					client.Port = 465;
					//client.EnableSsl = true;
					//client.Credentials = new System.Net.NetworkCredential
					//("username", "password");
					//client.EnableSsl = true;
					client.Host = "smtpout.asia.secureserver.net ";//smtpout.asia.secureserver.net
					//System.Net.Mail.SmtpClient mailClient = new System.Net.Mail.SmtpClient();
					////This object stores the authentication values
					 
					System.Net.NetworkCredential basicCrenntial =
					new System.Net.NetworkCredential("username", "password");
					 
					//mailClient.UseDefaultCredentials = false;
					 
					//mailClient.Credentials = basicCrenntial;
					 
					client.Send(MailMsg); //send it
					Label1.Text = "Message Sent Successfully"; //tell the person that the email was sent.
				}
				catch (Exception ex)
				{
					Label1.Text = "Error: " + ex.ToString(); //or tell the person that they screwed up and it's all their fault.... or what the actual error was.
				}
			}
		}
	}
}