title: CrossPostback ,AJAX Controls and ASP.NET generated postbacks work for .NET 4.5 , not .NET 4.0 in IE 11
body: <p>I had posted and answered the question earlier.<a href="https://stackoverflow.com/questions/17861424/webresource-axd-not-working-with-internet-explorer-11">WebResource.axd not working with Internet Explorer 11</a> <br/> But I thought the hotfix had fixed the issue(CrossPostback ,AJAX Controls and ASP.NET generated postbacks not working) but after installing in QA , it didn't work and we realized it was .NET 4.5 that made things work .<br/> I am under the process of comparing .NET frameworks folder between .NET 4 and .NET 4.5. What I needed to ask what could in .NET 4.5 really resolve the IE 11 issue.<br/> The major change in IE 11 is the user agent string. What particular fix in .NET 4.5 could have resolved the differences between ASP.NET 4.0 and IE 11. <br/> Manually merging the differences might not really help as in future if a security/hot fix gets installed in .NET 4.0 , these files might get overwritten. <br/>
  Another headsup , the issue is for IE 11 in Windows 7,8,8.1
  Any help or suggestions.<br/>
  <strong>UPDATE</strong> : We tried registering only the browser definitions of .NET 4.5 into .NET 4.0 but still the issue remains so apart from the definitions there are some libraries that make things work in IE 11.</p>