我应该在ASP.NET MVC项目中将类文件存储在何处？

I'm just starting to work with MVC and trying to understand the best practices behind designing an application. In the WebForms world, I typically just created a Classes folder where I stored all of my *.cs files. However, because of the way that MVC uses the folder structure to create different namespaces, I'm not sure that's the right thing to do any more. I can't seem to find any guidance from Microsoft on this topic, so I'm hoping someone here can oint me in the right direction.I'm just starting to work with MVC and trying t