bootstap css intellisense is not working in VS 2012 MVC

•  Link to external CSS files are given in correct format
  
  1. <link rel="stylesheet" href="bootstrap.css" />  
• Right click on the file in the solution explorer and click on "Open With", then select "HTML Editor"

• right click on the "Dashboard.cshtml" file in the Solution Explorer
• "open with"
• select "HTML Editor"
• "ok"

 Then just add .css file reference on View which you want then you will get intellisense of that .css file