Yesterday I blogged about the cause of ASP.NET validators and validation summary slowness . At that point I wasn't aware of the existence of the XHTML conformance configuration (thanks Nuno ). With the XHTML conformance configuration set to Legacy , the rendering of controls works like it worked in ASP...

When building ASP.NET pages, if you use too many validators and validation summaries your pages can become very slow. Have you ever wondered why? Lets build a simple page web page with a few validators. Something like this: The page is composed of: 2 TextBox es 1 RequiredFieldValidator for each TextBox...