Add an object to the end of the Collection in CSharp

using System;// www  .  j  av a 2  s . co  m
using System.Collections.Generic;
using System.Collections.ObjectModel;

public class Demo
{
    public static void Main()
    {
        Collection<string> myData = new Collection<string>();

        myData.Add("A");
        myData.Add("B");
        myData.Add("C");
        myData.Add("D");

        Console.WriteLine(myData.Count);
        
        foreach( string item in myData )
        {
            Console.WriteLine(item);
        }             
    }
}