/*
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* 2013-03-08 toAtWork
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* HashSet implementation for .net 2.0.
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*/
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using System.Collections;
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using System.Collections.Generic;
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namespace System.Windows.Forms
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{
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/// <summary>
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/// There is no HashSet<T> available in .net 2.0.
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/// </summary>
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/// <typeparam name="T">Der Typ des Sets</typeparam>
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[Serializable]
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public class Set<T> : ICollection<T>, IEnumerable<T>, IEnumerable
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{
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private readonly Dictionary<T, object> _items = new Dictionary<T, object>();
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#region ICollection<T>
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public void Add(T item)
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{
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if (item == null)
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return;
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_items[item] = null;
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}
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public void Clear()
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{
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_items.Clear();
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}
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public bool Contains(T item)
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{
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if (item == null)
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return false;
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return _items.ContainsKey(item);
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}
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public void CopyTo(T[] array, int arrayIndex)
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{
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_items.Keys.CopyTo(array, arrayIndex);
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}
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public int Count => _items.Count;
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public bool IsReadOnly => false;
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public bool Remove(T item)
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{
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if (item == null)
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return false;
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return _items.Remove(item);
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}
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public IEnumerator<T> GetEnumerator()
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{
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return _items.Keys.GetEnumerator();
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}
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IEnumerator IEnumerable.GetEnumerator()
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{
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return _items.Keys.GetEnumerator();
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}
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#endregion
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public void AddRange(IEnumerable<T> items)
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{
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if (items == null)
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return;
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foreach (T item in items)
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Add(item);
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}
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public T[] ToArray()
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{
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T[] array = new T[_items.Count];
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CopyTo(array, 0);
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return array;
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}
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}
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}
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