Question

For instance, this url is http://stackoverflow.com/questions/ask, instead of something like http://stackoverflow.com/questions/ask.aspx. How can I do this?

Answer 1

Add a reference to the assembly System.Web.Routing and then add the following to your global.asax file:

protected void Application_Start(object sender, EventArgs e)
{
     RegisterRoutes(RouteTable.Routes);
}

public static void RegisterRoutes(RouteCollection routes)
{
    routes.MapPageRoute("",
        "questions/ask/{question}",
        "~/questions/ask.aspx");
}