System.Web.MVC的位置，所以我可以用反射器反映它

I installed MVC 1.0. Where's the System.Web.MVC dll so that I can use reflector to see how the helper methods are coded? I've looked in the bin folder of my ASP.NET MVC web app but it's not there. I am not quite sure where the MVC 1.0 installer installs the dll and how that wires up to the web.config of your MVC apps. Is System.Web.MVC installed in the GAC or something? If so, how the heck can I reflect over the assembly?I installed MVC 1.0. Where's the System.Web.MVC