in your site in global.asax code behind file add the routing this way -

public static void RegisterRoutes(RouteCollection routeCollection)
{
routeCollection.RouteExistingFiles = false;
routeCollection.MapPageRoute("RouteForCustomer", "Projects/{Id}", "~/Projects.aspx");
}
protected void Application_Start(object sender, EventArgs e)
{
RegisterRoutes(RouteTable.Routes);
}

here you define how the route url will look like and the physical file
Projects.aspx in manageRoute method.

then in the Projects.aspx page load method you can access the username value
this way -

string User_Name = Page.RouteData.Values["Id"].ToString();