As mentioned earlier, please see Appendix B for working with files outside of Umbraco and for best practice advice on how to set up your development environment in Visual Studio 2010.
The CMS allows you to expose your styles to the Rich Text Editor data type in order for authors to truly get a WYSIWYG (What You See Is What You Get) environment in which to edit content. Best practice suggests that as a developer, you plan your styles in at least two different physical files—one for the layouts of your site and one that dictates aspects such as paragraph styles, floating images, headings, bulleted lists, and so on. The idea is that applying the “content” styles to the editor data type without the baggage of all the layout styles as well is then possible.
This can have an effect on ...