using System;

using System.Linq;

using System.Collections.Generic;

using System.Windows.Data;

​

public class Program

{

    public static void Main()

    {

        List<int> source = new List<int>{1, 2, 3, 4, 5};

        CollectionView view = new CollectionView(source);

        int filterValue = 5;

        view.Filter = x => (x is int) ? (int)x == filterValue : false;

        MoveCurrentTo(view, 2);

        Dump(view);

        DumpContains(view, 3);

        DumpCurrent(view);

        Console.WriteLine("---");

        filterValue = 2;

        MoveCurrentTo(view, 2);

        Dump(view);

        DumpContains(view, 3);

        DumpCurrent(view);

        Console.WriteLine("---");

        filterValue = 3;

        MoveCurrentTo(view, 2);

        Dump(view);

        DumpContains(view, 3);

        DumpCurrent(view);

    }

​

    private static void Dump(CollectionView view)

    {

        Console.WriteLine("<Collection>");

        foreach (var value in view)

        {

            Console.WriteLine("    {0}", value);

        }

​

        Console.WriteLine("</>");

    }

    private static void MoveCurrentTo(CollectionView view, int value)

    {

        Console.WriteLine("{0} current to {1}", view.MoveCurrentTo(value) ? "Moved" : "Did not move", value);

    }

​

    private static void DumpCurrent(CollectionView view)

    {

        Console.WriteLine("Current: {0}", view.CurrentItem);

    }

​

    private static void DumpContains(CollectionView view, int value)

    {

        Console.WriteLine("{0} {1}", view.Contains(value) ? "Contains" : "Does not contain", value);

    }

}