I have created new asp.net mvc 5 project in visual studio 2015 professional And I have added meta tag in my layout for Content Security Policy as -
Apparently modernizr either injects a style
element with some CSS properties, or else injects some style
attributes; you can deal with it by changing your CSP policy this:
<meta http-equiv="content-security-policy"
content="default-src 'none'; script-src 'self';
connect-src 'self'; img-src 'self';
style-src 'self' 'sha256-CwE3Bg0VYQOIdNAkbB/Btdkhul49qZuwgNCMPgNY5zw=';" />