From 44a3eb13440a6e25bf589c1a6803e7a0f729d12a Mon Sep 17 00:00:00 2001
From: axunonb <axunonb@users.noreply.github.com>
Date: Mon, 12 May 2025 14:31:41 +0200
Subject: [PATCH] Remove unnecessary `GroupedListEnumerator`

---
 Ical.Net/Collections/GroupedList.cs           |   2 +-
 Ical.Net/Collections/GroupedListEnumerator.cs | 106 ------------------
 2 files changed, 1 insertion(+), 107 deletions(-)
 delete mode 100644 Ical.Net/Collections/GroupedListEnumerator.cs

diff --git a/Ical.Net/Collections/GroupedList.cs b/Ical.Net/Collections/GroupedList.cs
index 3a8067e9f..4e26757ab 100644
--- a/Ical.Net/Collections/GroupedList.cs
+++ b/Ical.Net/Collections/GroupedList.cs
@@ -218,7 +218,7 @@ TItem IList<TItem>.this[int index]
         set => this[index] = value;
     }
 
-    public IEnumerator<TItem> GetEnumerator() => new GroupedListEnumerator<TItem>(_lists);
+    public IEnumerator<TItem> GetEnumerator() => _lists.SelectMany(x => x).GetEnumerator();
 
     IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
 }
diff --git a/Ical.Net/Collections/GroupedListEnumerator.cs b/Ical.Net/Collections/GroupedListEnumerator.cs
deleted file mode 100644
index 33997caab..000000000
--- a/Ical.Net/Collections/GroupedListEnumerator.cs
+++ /dev/null
@@ -1,106 +0,0 @@
-//
-// Copyright ical.net project maintainers and contributors.
-// Licensed under the MIT license.
-//
-
-using System;
-using System.Collections;
-using System.Collections.Generic;
-
-namespace Ical.Net.Collections;
-
-public class GroupedListEnumerator<TType> :
-   IEnumerator<TType> where TType : class
-{
-    private readonly IList<IMultiLinkedList<TType>>? _lists;
-    private IEnumerator<IMultiLinkedList<TType>>? _listsEnumerator;
-    private IEnumerator<TType>? _listEnumerator;
-
-    public GroupedListEnumerator(IList<IMultiLinkedList<TType>> lists) => _lists = lists;
-
-    public virtual TType Current
-        => _listEnumerator == null
-            ? throw new InvalidOperationException("List enumerator is null.")
-            : _listEnumerator.Current;
-
-    public virtual void Dispose()
-    {
-        Reset();
-    }
-
-    private void DisposeListEnumerator()
-    {
-        if (_listEnumerator == null)
-        {
-            return;
-        }
-        _listEnumerator.Dispose();
-        _listEnumerator = null;
-    }
-
-    object IEnumerator.Current
-        => _listEnumerator == null
-            ? throw new InvalidOperationException("List enumerator is null.")
-            : _listEnumerator.Current;
-
-    private bool MoveNextList()
-    {
-        if (_listsEnumerator == null)
-        {
-            _listsEnumerator = _lists?.GetEnumerator();
-        }
-
-        if (_listsEnumerator == null)
-        {
-            return false;
-        }
-
-        if (!_listsEnumerator.MoveNext())
-        {
-            return false;
-        }
-
-        DisposeListEnumerator();
-
-        _listEnumerator = _listsEnumerator.Current.GetEnumerator();
-        return true;
-    }
-
-    public virtual bool MoveNext()
-    {
-        while (true)
-        {
-            if (_listEnumerator == null)
-            {
-                if (MoveNextList())
-                {
-                    continue;
-                }
-            }
-            else
-            {
-                if (_listEnumerator.MoveNext())
-                {
-                    return true;
-                }
-                DisposeListEnumerator();
-                if (MoveNextList())
-                {
-                    continue;
-                }
-            }
-            return false;
-        }
-    }
-
-    public virtual void Reset()
-    {
-        if (_listsEnumerator == null)
-        {
-            return;
-        }
-
-        _listsEnumerator.Dispose();
-        _listsEnumerator = null;
-    }
-}