public void SubPropertyFormat() { TempletObject obj = new TempletObject { IpAddress = "192.168.8.91", UserName = "******" }; string htmlContent = new MailTemplet(@"Hello,{user.IpAddress.Length}!").SetVariable("user", obj) .ToHtmlContent(); //Console.Write(htmlContent); Debug.Assert(htmlContent.Equals("Hello,12!")); }