rudimentary implementation of an Append-Only linked list (e.g. for blockchains)

MBS.Framework/Collections/Generic/AppendOnlyLinkedList.cs

@@ -0,0 +1,74 @@
+//
+//  ReadOnlyLinkedListt.cs
+//
+//  Author:
+//       Michael Becker <alcexhim@gmail.com>
+//
+//  Copyright (c) 2021 Mike Becker's Software
+//
+//  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 <http://www.gnu.org/licenses/>.
+using System;
+using System.Collections.Generic;
+
+namespace MBS.Framework.Collections.Generic
+{
+	public class AppendOnlyLinkedList<T> : ICollection<T>
+	{
+		private LinkedList<T> _list = new LinkedList<T>();
+
+		protected LinkedListNode<T> Last { get { return _list.Last; } }
+
+		System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
+		{
+			return _list.GetEnumerator();
+		}
+		IEnumerator<T> IEnumerable<T>.GetEnumerator()
+		{
+			return _list.GetEnumerator();
+		}
+
+		public int Count { get { return _list.Count; } }
+
+		bool ICollection<T>.IsReadOnly { get; } = false;
+
+		void ICollection<T>.Clear()
+		{
+			throw new NotSupportedException();
+		}
+
+		public bool Contains(T item)
+		{
+			return _list.Contains(item);
+		}
+
+		public void CopyTo(T[] array, int arrayIndex)
+		{
+			_list.CopyTo(array, arrayIndex);
+		}
+
+		bool ICollection<T>.Remove(T item)
+		{
+			throw new NotSupportedException();
+		}
+
+		protected virtual void InsertItem(T item)
+		{
+			_list.AddLast(item);
+		}
+		public void Add(T item)
+		{
+			InsertItem(item);
+		}
+	}
+}

MBS.Framework/MBS.Framework.csproj

@@ -123,6 +123,7 @@
     <Compile Include="MathExtensions.cs" />
     <Compile Include="Collections\Generic\HandleDictionary.cs" />
     <Compile Include="Collections\ExtensionMethods.cs" />
+    <Compile Include="Collections\Generic\AppendOnlyLinkedList.cs" />
   </ItemGroup>
   <ItemGroup>
     <Folder Include="Logic\" />