title: What are .CSX C# files for?
body: <p>I've heard of .cs files but never of <a href="http://www.hanselman.com/blog/ItsJustASoftwareIssueEdgejsBringsNodeAndNETTogetherOnThreePlatforms.aspx">.csx files</a>. Google searches led me to CSX corporation and other unwanted bodies. Can someone provide a terse description of what a CSX file is, and perhaps the main differences between CSX and CS?</p>