Get the number of elements that are contained in HashSet in CSharp

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

public class MainClass{
  public static void Main(String[] argv){  
    HashSet<int> evenNumbers = new HashSet<int>();
    for (int i = 0; i < 5; i++)
    {
        evenNumbers.Add(i * 2);
    }
    Console.WriteLine(evenNumbers.Count);
  }
}