How can I detect dead code in my C# application?
Compile your code and check the warnings in the Error List. The following code:
public ActionResult Index() {
ViewData["Message"] = "Welcome to ASP.NET MVC!";
return View();
return null; // unreachable
}
produces this warning:
Warning 11 Unreachable code detected <fullpath>\HomeController.cs 13 13 <prjname>
Tools like JetBrains ReSharper (http://jetbrains.com/resharper)* can also perform this analysis on the fly and highlight dead code.
* ReSharper is a commercial tool.