IE8 force render in IE8 mode
Category: DotNet
To set the mode in which IE8 renders add the following tag to the top of the head section, above the title tag:
< meta http-equiv="X-UA-Compatible" content="IE=edge" />
This will get rid of the option on IE8 to view the page in compatibility mode, so that if your page is optimized for IE8, or newer browsers, users won't screw it up by clicking on compatibility mode.
For more info and to set up in IIS via web.config go here: http://msdn.microsoft.com/en-us/library/cc288325%28VS.85%29.aspx