How to Send An E-Mail from your ASP.NET Web Application...?

using System.Net.Mail;
using System.Net;

System.Net.Mail.MailMessage mm = new System.Net.Mail.MailMessage();
mm.To.Add(new System.Net.Mail.MailAddress("Email Address","Name"));
mm.From = new System.Net.Mail.MailAddress("Email Address");
mm.Sender = new System.Net.Mail.MailAddress("Email Address","Name");
mm.Subject = "This is Test Email";
mm.Body = "<h3>This is Testing SMTP Mail Send By Me</h3>";
mm.IsBodyHtml = true;
mm.Priority = System.Net.Mail.MailPriority.High; // Set Priority to sending mail
System.Net.Mail.SmtpClient smtCliend = new System.Net.Mail.SmtpClient();
smtCliend.Host = "Your smtp server";
smtCliend.Port = 25;    // smtp port no            
smtCliend.Credentials = new NetworkCredential("User Name", "Password");
smtCliend.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
try
{
smtCliend.Send(mm);
}
catch (System.Net.Mail.SmtpException ex)
{
lblMsg.Text = ex.ToString();
}
catch (Exception exe)
{
lblMsg.Text = "\n\n\n"+exe.ToString();
}

Import System.Net.Mail;
Import System.Net;

Dim mm As New System.Net.Mail.MailMessage()
mm.[To].Add(New System.Net.Mail.MailAddress("Email Address", "Name"))
mm.From = New System.Net.Mail.MailAddress("Email Address")
mm.Sender = New System.Net.Mail.MailAddress("Email Address", "Name")
mm.Subject = "This is Test Email"
mm.Body = "<h3>This is Testing SMTP Mail Send By Me</h3>"
mm.IsBodyHtml = True
mm.Priority = System.Net.Mail.MailPriority.High
' Set Priority to sending mail
Dim smtCliend As New System.Net.Mail.SmtpClient()
smtCliend.Host = "Your smtp server"
smtCliend.Port = 25
' smtp port no            
smtCliend.Credentials = New NetworkCredential("User Name", "Password")
smtCliend.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network
Try
	smtCliend.Send(mm)
Catch ex As System.Net.Mail.SmtpException
	lblMsg.Text = ex.ToString()
Catch exe As Exception
	lblMsg.Text = vbLf & vbLf & vbLf + exe.ToString()
End Try