http://mysite.com

http://mysite.com/home

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;

namespace MyProject
{
    public class MvcApplication : System.Web.HttpApplication
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            // Default route
            routes.MapRoute(
                "Default",// Route name
                "{controller}/{action}/{id}",// URL with parameters
                new { controller = "Home",action = "Index",id = UrlParameter.Optional },// Parameter defaults
                new string[] {"MyProject.Controllers"}
            );
        }

        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            RegisterRoutes(RouteTable.Routes);
        }
    }
}