using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var HashA = new HashSet<List<string>> { new List<string> {"ItemA", "ItemB"}};

        var HashB = new HashSet<List<string>> { new List<string> {"ItemA", "ItemB"}};

        //var ListA = new List<string>{"ItemA", "ItemB"};

        //var ListB = new List<string>{"ItemA", "ItemB"};

        var ResultA = HashA.SetEquals(HashB);

        //var ResultB = ListA.SetEquals(ListB);

    }

}