title: how render string to html link
body: <p>I send some message to email as below:</p>
  
  <pre><code>string link = "http://localhost:1900/ResetPassword/?username=" + user.UserName + "&amp;reset=" + HashResetParams( user.UserName, user.ProviderUserKey.ToString() );
  email.Body = link;
  </code></pre>
  
  <p>This string was sent to email, but shown as string, not as link, I want send it as link to click. </p>