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+#region License
+
+// Copyright (C) 2020 Reetus
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#endregion
+
+using System.Collections.Concurrent;
+using System.Linq;
+
+namespace ClassicAssist.UO.Objects
+{
+    public class MenuCollection
+    {
+        public delegate void dCollectionChanged( Menu[] menus );
+
+        private readonly ConcurrentDictionary<int, Menu> _dictionary;
+
+        public MenuCollection()
+        {
+            _dictionary = new ConcurrentDictionary<int, Menu>();
+        }
+
+        public event dCollectionChanged CollectionChangedEvent;
+
+        public void Add( Menu menu )
+        {
+            bool result = _dictionary.AddOrUpdate( menu.ID, menu, ( k, v ) => menu ) != null;
+
+            if ( result )
+            {
+                OnCollectionChanged();
+            }
+        }
+
+        public bool Remove( int id )
+        {
+            bool result = _dictionary.TryRemove( id, out Menu m );
+
+            if ( result )
+            {
+                OnCollectionChanged();
+            }
+
+            return result;
+        }
+
+        public bool GetMenu( int id, out Menu menu )
+        {
+            return _dictionary.TryGetValue( id, out menu );
+        }
+
+        public bool FindMenu( int serial, out Menu menu )
+        {
+            menu = _dictionary.Values.FirstOrDefault( g => g.Serial == serial );
+
+            return menu != null;
+        }
+
+        public bool GetMenus( out Menu[] menus )
+        {
+            menus = null;
+
+            if ( _dictionary.Values.Count == 0 )
+            {
+                return false;
+            }
+
+            menus = _dictionary.Values.ToArray();
+
+            return menus.Length > 0;
+        }
+
+        public void Clear()
+        {
+            int previousCount = _dictionary.Count;
+
+            _dictionary.Clear();
+
+            if ( previousCount > 0 )
+            {
+                OnCollectionChanged();
+            }
+        }
+
+        private void OnCollectionChanged()
+        {
+            CollectionChangedEvent?.Invoke( _dictionary.Values.ToArray() );
+        }
+    }
+}