How can I update my webbrowser for IE version ?

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C#

Javascript

.NET

web_browser

I am using IE version 11.

But When I upload a website through webbrowser control, I can see that through the following code my webBrowser using IE 9.

private string GetIEVersion()
       {
           string key = @"Software\Microsoft\Internet Explorer";
           Microsoft.Win32.RegistryKey dkey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(key, false);
           string data = dkey.GetValue("Version").ToString();
           return data;
       }

This function return data equal 9.11.9600.17420.

So how can I upgrade my webBrowser from 9 to 11 ?