Force IE 11 to run in IE 8 compatibility mode in ASP.NET

Question

My website renders properly in IE8, when I use windows 8.1, the default browser which comes is IE11, How can we force IE 11 to run in IE 8 compatibility mode.

I have already tried the option stated in other posts

How to force compatibility mode for all versions of IE?

ASP.NET Project and IE10 Compatibility Mode issues in Windows 7

Why does IE9 switch to compatibility mode on my website?

I am setting in my root web config like

<httpProtocol>
      <customHeaders>
        <remove name="X-UA-Compatible"/>
        <add name="X-UA-Compatible" value="IE=EmulateIE8"/>
      </customHeaders>
    </httpProtocol>

If I check the response header using fiddler , it's says to me X-UA-Compatible: IE=EmulateIE8

But's it's still not rendering properly.

Answer 1

I think you want "IE=8":

<meta http-equiv="x-ua-compatible" content="IE=8">

See: specifying legacy document modes on MSDN.