ASP.NET

<br />
    Dim bcap As HttpBrowserCapabilities<br />
        Dim bookmarkCookie As HttpCookie<br />
        bcap = Request.Browser<br />
<br />
<br />
        If Not bcap.Cookies = True Then<br />
            wc_header.setError("Cannot bookmark page, Cookie is not enabled in this browser")<br />
            Return False<br />
<br />
        Else<br />
            bookmarkCookie = New HttpCookie("pageBookmark")<br />
            bookmarkCookie.Path = Server.MapPath("../")<br />
            bookmarkCookie("pageID" & pID) = CType(pID, String)<br />
            bookmarkCookie.Expires = Now.AddDays(1)<br />
            Request.Cookies.Add(bookmarkCookie)<br />
<br />
            Return True<br />
<br />
        End If<br />
<br />

Web Application:

Session["myObject"];

WebService:

    [WebMethod(EnableSession = true) ]
    public SuperSession GetSuperSession(string UserName)
    {
        List<object> ListOfObject = (List<object>)Session["myObject"];

        return ListOfObject;
    }

To be XML serializable, types which inherit from ICollection must have an implementation of Add(System.Object) at all levels of their inheritance hierarchy. System.Web.SessionState.HttpSessionState does not implement Add(System.Object). 

<asp:Panel ID="panRepresentatives" runat="server" Visible="<%#this.GetDefaultVisible() %>">
    <h1>Executive Committee Discipline Representatives</h1>
    <asp:Repeater ID="repRepresentatives" runat="server" DataSourceID="dsRepresentatives">
        <HeaderTemplate>...</HeaderTemplate>
        <ItemTemplate>...</ItemTemplate>
        <FooterTemplate>...</FooterTemplate>
    </asp:Repeater>
</asp:Panel>

protected bool GetDefaultVisible()
{
    if ((this.Request.QueryString["position"] == null) && (this.Request.QueryString["id"] == null))
        return true;
    return false;
}