ASP.NET

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;
}