Check if an element is in the Collection in CSharp

using System;/*from   w  ww  . j  ava2 s.  c o 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.Contains("A"));
    }
}