title: ASP.NET MVC Bootstrap is not work properly
body: <p>My bootstrap in ASP.NET MVC is up-to-date (v4.1.3). When I use dropdown components, it does not work properly!</p>
  
  <p><a href="https://i.stack.imgur.com/by8Pd.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/by8Pd.png" alt="Here is the result"></a></p>
  
  <p>Then I use:  and comment out <code>@Style.Render(~/Content/css)</code></p>
  
  <p>It goes like this: </p>
  
  <p><a href="https://i.stack.imgur.com/wDt9U.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wDt9U.png" alt="Result"></a></p>
  
  <p>How could I fix this? (I have checked carefully the version of bootstrap in Content folder. It have no problems. As the same as the latest one I download from getbootstrap.com</p>