I have always been able to turn off request validation on IIS and cassini when I need to post HTML from an HTML Editor. Problem is I can't seem to do so on IIS express. Have tried the following:
<%@ Page Language="C#" ValidateRequest="false"
<system.web>
<pages validateRequest="false">
Any ideas?
Thanks.
Maybe you could try to change the web.config like this:
<system.web>
<httpRuntime requestValidationMode="2.0" />
</system.web>
(more info here: http://www.asp.net/learn/whitepapers/aspnet4/breaking-changes)