MainWindow.cs

using System.Windows;

namespace PageableListBox
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            DataContext = new MainWindowVm();
        }
    }
}

MainWindow.xaml

<Window x:Class="PageableListBox.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <ListBox ItemsSource="{Binding Items}" />
</Window>

MainWindowVm.cs

using System;
using System.Reactive.Linq;
using DynamicData;
using DynamicData.Binding;
using DynamicData.Controllers;

namespace PageableListBox
{
    public class MainWindowVm
    {
        public ObservableCollectionExtended<MyVm> Items { get; set; }

        public MainWindowVm()
        {
            var myCache = new SourceCache<MyVm, string>(myobject => myobject.Id);

            //this is an extension of observable collection optimised for dynamic data
            Items = new ObservableCollectionExtended<MyVm>();
            //these controllers enable dynamically changing filter, sort and page
            var pageController = new PageController();
            var filterController = new FilterController<MyVm>();
            var sortController = new SortController<MyVm>(SortExpressionComparer<MyVm>.Ascending(t => t.Id));

            var mySubscription = myCache.Connect()
                .Filter(filterController)
                .Sort(sortController)
                .Page(pageController)
                .ObserveOnDispatcher() 
                .Bind(Items)
                .Subscribe(); 

            myCache.AddOrUpdate(new MyVm("1"));
        }
    }
}