In related news, if you're using ASP.NET MVC, there is a way to use the familiar Razor templating engine to template your emails (or anything else, really). To do that you just need to install RazorEngine ( http://razorengine.codeplex.com/ ) - it exposes Razor in a way that it can be used for things other than rendering pages.

Here's how I use it right now:

  string templateFile = HttpContext.Current.Server
    .MapPath("~/App_Data/InviteUser.cshtml");
  string template = System.IO.File.ReadAllText(templateFile);
  var model = new
  {
    inviterName = "A user",
    inviterEmail = inviterEmail,
    manufacturerName = inviterMfr,
    UserId = person.PrimaryEmail,
    UserPassword = person.GeneratedPassword,
  };
  var bodyHtml = RazorEngine.Razor.Parse(template, model);

And the template:

  <html>
  <body>
    <p>
        @Model.inviterName (@Model.inviterEmail) 
        @if (Model.manufacturerName != null)
        {
            <span>on behalf of <b>@Model.manufacturerName</b></span>
        }
        is inviting you to explore Mercury Catalog by AmpTab - the best furniture catalog app for the iPad:
    </p>
  [SNIP-SNIP]