diff --git a/ICSharpCode.Decompiler/Util/ProjectedList.cs b/ICSharpCode.Decompiler/Util/ProjectedList.cs
deleted file mode 100644
index f5f73f933..000000000
--- a/ICSharpCode.Decompiler/Util/ProjectedList.cs
+++ /dev/null
@@ -1,118 +0,0 @@
-#nullable enable
-// Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
-// 
-// Permission is hereby granted, free of charge, to any person obtaining a copy of this
-// software and associated documentation files (the "Software"), to deal in the Software
-// without restriction, including without limitation the rights to use, copy, modify, merge,
-// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
-// to whom the Software is furnished to do so, subject to the following conditions:
-// 
-// The above copyright notice and this permission notice shall be included in all copies or
-// substantial portions of the Software.
-// 
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
-// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
-// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
-// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-using System;
-using System.Collections.Generic;
-
-namespace ICSharpCode.Decompiler.Util
-{
-	public sealed class ProjectedList<TInput, TOutput> : IReadOnlyList<TOutput> where TOutput : class
-	{
-		readonly IList<TInput> input;
-		readonly Func<TInput, TOutput> projection;
-		readonly TOutput?[] items;
-
-		public ProjectedList(IList<TInput> input, Func<TInput, TOutput> projection)
-		{
-			if (input == null)
-				throw new ArgumentNullException(nameof(input));
-			if (projection == null)
-				throw new ArgumentNullException(nameof(projection));
-			this.input = input;
-			this.projection = projection;
-			this.items = new TOutput?[input.Count];
-		}
-
-		public TOutput this[int index] {
-			get {
-				TOutput? output = LazyInit.VolatileRead(ref items[index]);
-				if (output != null)
-				{
-					return output;
-				}
-				return LazyInit.GetOrSet(ref items[index], projection(input[index]));
-			}
-		}
-
-		public int Count {
-			get { return items.Length; }
-		}
-
-		public IEnumerator<TOutput> GetEnumerator()
-		{
-			for (int i = 0; i < this.Count; i++)
-			{
-				yield return this[i];
-			}
-		}
-
-		System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
-		{
-			return GetEnumerator();
-		}
-	}
-
-	public sealed class ProjectedList<TContext, TInput, TOutput> : IReadOnlyList<TOutput> where TOutput : class
-	{
-		readonly IList<TInput> input;
-		readonly TContext context;
-		readonly Func<TContext, TInput, TOutput> projection;
-		readonly TOutput?[] items;
-
-		public ProjectedList(TContext context, IList<TInput> input, Func<TContext, TInput, TOutput> projection)
-		{
-			if (input == null)
-				throw new ArgumentNullException(nameof(input));
-			if (projection == null)
-				throw new ArgumentNullException(nameof(projection));
-			this.input = input;
-			this.context = context;
-			this.projection = projection;
-			this.items = new TOutput?[input.Count];
-		}
-
-		public TOutput this[int index] {
-			get {
-				TOutput? output = LazyInit.VolatileRead(ref items[index]);
-				if (output != null)
-				{
-					return output;
-				}
-				return LazyInit.GetOrSet(ref items[index], projection(context, input[index]));
-			}
-		}
-
-		public int Count {
-			get { return items.Length; }
-		}
-
-		public IEnumerator<TOutput> GetEnumerator()
-		{
-			for (int i = 0; i < this.Count; i++)
-			{
-				yield return this[i];
-			}
-		}
-
-		System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
-		{
-			return GetEnumerator();
-		}
-	}
-}