这些在ASP.NET Web Forms 4.5中引用捆绑CSS的方法有什么区别？

I used Visual Studio 2012 and the built-in template (under Add -> New Project) to create a brand new ASP.NET Web Forms web application project targeting .NET Framework 4.5. Inside the Site.Master page provided by default I see some markup that includes CSS on the page, which looks like this:I used Visual Studio 2012 and the built-in temp