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AspClassic.Scripting/Utils/DictionaryUnionEnumerator.cs

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+using System.Collections;
+using System.Collections.Generic;
+
+namespace AspClassic.Scripting.Utils;
+
+internal class DictionaryUnionEnumerator : CheckedDictionaryEnumerator
+{
+	private IList<IDictionaryEnumerator> _enums;
+
+	private int _current;
+
+	public DictionaryUnionEnumerator(IList<IDictionaryEnumerator> enums)
+	{
+		_enums = enums;
+	}
+
+	protected override object GetKey()
+	{
+		return _enums[_current].Key;
+	}
+
+	protected override object GetValue()
+	{
+		return _enums[_current].Value;
+	}
+
+	protected override bool DoMoveNext()
+	{
+		if (_current == _enums.Count)
+		{
+			return false;
+		}
+		if (_enums[_current].MoveNext())
+		{
+			return true;
+		}
+		_current++;
+		return DoMoveNext();
+	}
+
+	protected override void DoReset()
+	{
+		for (int i = 0; i < _enums.Count; i++)
+		{
+			_enums[i].Reset();
+		}
+		_current = 0;
+	}
+}