How to: Use Routing with Web Forms

<add assembly="System.Web.Routing, Version=3.5.0.0, 
  Culture=neutral, 
  PublicKeyToken=31BF3856AD364E35"/>

<httpModules>
  <add name="UrlRoutingModule" 
       type="System.Web.Routing.UrlRoutingModule, 
             System.Web.Routing, 
             Version=3.5.0.0, 
             Culture=neutral, 
             PublicKeyToken=31BF3856AD364E35"/>
</httpModules>

<system.webServer>
  <modules>
    <remove name="UrlRoutingModule" />
    <add name="UrlRoutingModule" 
         type="System.Web.Routing.UrlRoutingModule, 
               System.Web.Routing, 
               Version=3.5.0.0, 
               Culture=neutral, 
               PublicKeyToken=31BF3856AD364E35"/>
  </modules>
</system.webServer>

<system.webServer>
  <handlers>
    <add name="UrlRoutingHandler" 
         preCondition="integratedMode" 
         verb="*" 
         path="UrlRouting.axd" 
         type="System.Web.HttpForbiddenHandler, 
               System.Web, Version=2.0.0.0, 
               Culture=neutral, 
               PublicKeyToken=b03f5f7f11d50a3a" />
  </handlers>
</system.webServer>

Public Class CustomRouteHandler
    Implements IRouteHandler

    Private _virtualPath As String

    Public Sub New(ByVal vPath As String)
        _virtualPath = vPath
    End Sub

    Public Property VirtualPath() As String
        Get
            Return _virtualPath
        End Get
        Private Set(ByVal value As String)
            _virtualPath = value
        End Set
    End Property

    Public Function GetHttpHandler(ByVal requestContext _
          As System.Web.Routing.RequestContext) _
          As System.Web.IHttpHandler _
          Implements System.Web.Routing.IRouteHandler.GetHttpHandler
        Dim redirectPage As IHttpHandler
        redirectPage = _
          BuildManager.CreateInstanceFromVirtualPath(VirtualPath, _
          GetType(Page))
        Return redirectPage
    End Function
End Class

public class CustomRouteHandler : IRouteHandler
{
    public CustomRouteHandler(string virtualPath)
    {
        this.VirtualPath = virtualPath;
    }

    public string VirtualPath { get; private set; }

    public IHttpHandler GetHttpHandler(RequestContext 
          requestContext)
    {
        var page = BuildManager.CreateInstanceFromVirtualPath
             (VirtualPath, typeof(Page)) as IHttpHandler;
        return page;
    }
}

<%@ Import Namespace="System.Web.Routing" %>

Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
    RegisterRoutes(RouteTable.Routes)
End Sub

Shared Sub RegisterRoutes(ByVal routes As RouteCollection)
    routes.Add("BikeSaleRoute", New Route _
    ( _
       "bikes/sale", New CustomRouteHandler("~/Contoso/Products/Details.aspx") _
    ))
End Sub

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

public static void RegisterRoutes(RouteCollection routes)
{
    routes.Add("BikeSaleRoute", new Route
    (
       "bikes/sale", 
       new CustomRouteHandler("~/Contoso/Products/Details.aspx")
    ));
}