This issue can be mitigated by avoiding constructs that cause a restart of the parser. The most common cause of restarts is specification of the CHARSET in a META tag. (There are other, more obscure causes of restarts, but the CHARSET is believed to be the most common).
By declaring the CHARSET of the page using the HTTP Content-Type header rather than specifying it within the page, you can remove one cause of parser restarts.
So, rather than putting
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8">
In your head tag, instead, send the following HTTP response header:
Content-Type: text/html; charset=utf-8
Note that specification of the charset in the HTTP header results in improved performance in all browsers, because the browser's parsers need not restart parsing from the beginning upon encountering the character set declaration. Furthermore, using the HTTP header helps mitigate certain XSS attack vectors.
for more help follow this link-
http://connect.microsoft.com/VisualStudio/feedback/details/434997/invalid-webresource-axd-parameters-being-generated
Hope this will help you.