Sending SMTP Email in C# - .NET 1.x and .2.0

Microsoft, at least with software development, have a tendency to be reasonably consistent, which is why I was surprised recently that the class structure of .NET 1.x and 2.0 have changed somewhat.

Code for sending email, .NET 1.1:

using System.Web.Util;
MailMessage mail = new MailMessage("from@addr.com", "to@addr.com",
                                   "My subject", "Text body");
SmtpMail smtp("relay.server.com");
string res = SmtpMail.Send(mail);

Code for sendmail email, .NET 2.0:

using System.Net.Mail;
MailMessage mail = new MailMessage("from@addr.com", "to@addr.com",
                                  "My subject", "Text body");
SmtpClient smtp("relay.server.com");
string res = smtp.Send(mail);