init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Utilities/Collections/HashSet.cs

@@ -0,0 +1,79 @@
+using System;
+using System.Collections;
+
+namespace Org.BouncyCastle.Utilities.Collections;
+
+public class HashSet : ISet, ICollection, IEnumerable
+{
+	private readonly IDictionary impl = Platform.CreateHashtable();
+
+	public virtual int Count => impl.Count;
+
+	public virtual bool IsEmpty => impl.Count == 0;
+
+	public virtual bool IsFixedSize => impl.IsFixedSize;
+
+	public virtual bool IsReadOnly => impl.IsReadOnly;
+
+	public virtual bool IsSynchronized => impl.IsSynchronized;
+
+	public virtual object SyncRoot => impl.SyncRoot;
+
+	public HashSet()
+	{
+	}
+
+	public HashSet(IEnumerable s)
+	{
+		foreach (object item in s)
+		{
+			Add(item);
+		}
+	}
+
+	public virtual void Add(object o)
+	{
+		impl[o] = null;
+	}
+
+	public virtual void AddAll(IEnumerable e)
+	{
+		foreach (object item in e)
+		{
+			Add(item);
+		}
+	}
+
+	public virtual void Clear()
+	{
+		impl.Clear();
+	}
+
+	public virtual bool Contains(object o)
+	{
+		return impl.Contains(o);
+	}
+
+	public virtual void CopyTo(Array array, int index)
+	{
+		impl.Keys.CopyTo(array, index);
+	}
+
+	public virtual IEnumerator GetEnumerator()
+	{
+		return impl.Keys.GetEnumerator();
+	}
+
+	public virtual void Remove(object o)
+	{
+		impl.Remove(o);
+	}
+
+	public virtual void RemoveAll(IEnumerable e)
+	{
+		foreach (object item in e)
+		{
+			Remove(item);
+		}
+	}
+}