Before navigating the URL, write meta into webbrowser's documenttext property as follows:
//Setting compatible mode of IE.
this.m_oWebBrowser.DocumentText =
@"<html>
<head><meta http-equiv=""X-UA-Compatible""
content=""IE=IE11"" /> </head>
<body></body>
</html>";
this.m_oWebBrowser.Navigate("www.cnblogs.com");