Remove all elements from a HashSet in CSharp

using System;/*www . ja v  a 2s.  c  o 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);
    
    evenNumbers.Clear();
    
    Console.WriteLine(evenNumbers.Count);
  }
}