syntax - ASP.NET <%= %> vs <%: %>

Question

It seems I am missing something. But ever since .Net 4.0 came out I have been seeing reference to <%: %> syntax for ASP.NET. It seems like it is similar to <%= %> but clearly there is a reason for the new syntax. I tried google but searching <%: %> doesn't seem to return anything. What does the <%: %> syntax do? Was it introduced in .Net 4.0 or 3.5? Can someone enlighten me?

Edited: Please provide reference or examples

Answer 1

i believe the <%: %> is auto HtmlEncoding

this post from Scott Gu will help to explain - it was introduced in .net 4 and MVC2

http://weblogs.asp.net/scottgu/archive/2010/04/06/new-lt-gt-syntax-for-html-encoding-output-in-asp-net-4-and-asp-net-mvc-2.aspx