using System;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.Linq;

namespace ObservableCollection
{
    class Program
    {
        static void Main(string[] args)
        {
            ObservableCollection<String> obs = new ObservableCollection<String>();
            obs.CollectionChanged += Obs_CollectionChanged;
            //Thay các phần tử tập hợp
            obs.Add("Thao Meo");
            obs.Add("Cai Tri Minh");
            obs.Add("Vo Son Bang");
            obs.Add("Hoang Thi Thao");
            obs.Add("Nguyen Đinh Tuyen");
            obs.Add("Trinh Quoc Khang");
            obs.Add("Lap trinh VB.NET");
            obs.RemoveAt(1);
            obs.Clear();
            Console.Read();
        }

        private static void Obs_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
        {
            switch (e.Action)
            {
                case NotifyCollectionChangedAction.Add:
                    foreach (String s in e.NewItems)
                        Console.WriteLine("Event Add Item: " + s);
                    break;
                case NotifyCollectionChangedAction.Remove:
                    foreach (String s in e.OldItems)
                        Console.WriteLine("Event Remove item: " + s);
                    break;
                case NotifyCollectionChangedAction.Replace:
                    Console.WriteLine("Event Replace");
                    break;
                case NotifyCollectionChangedAction.Move:
                    Console.WriteLine("Event RemoveMove");
                    break;
                case NotifyCollectionChangedAction.Reset:
                    Console.WriteLine("Event Reset");
                    break;
                default:
                    break;
            }


        }
    }
}

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