HashSet.cs

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using System;
using System.Collections;

namespace BenTools.Data
{
    public class HashSet : IEnumerable, ICollection
    {
        Hashtable H = new Hashtable();
        object Dummy = new object();
        public HashSet(){}
        public void Add(object O)
        {
            H[O] = Dummy;
        }
        public void AddRange(IEnumerable List)
        {
            foreach(object O in List)
                Add(O);
        }
        public void Remove(object O)
        {
            H.Remove(O);
        }
        public bool Contains(object O)
        {
            return H.ContainsKey(O);
        }
        public void Clear()
        {
            H.Clear();
        }
        public IEnumerator GetEnumerator()
        {
            return H.Keys.GetEnumerator();
        }
        public int Count
        {
            get
            {
                return H.Count;
            }
        }

        public bool IsSynchronized
        {
            get
            {
                return H.IsSynchronized;
            }
        }

        public void CopyTo(Array array, int index)
        {
            H.Keys.CopyTo(array,index);
        }

        public object SyncRoot
        {
            get
            {
                return H.SyncRoot;
            }
        }
    }
}