diff --git a/Recyclable.Collections/RecyclableCollectionVersion.cs b/Recyclable.Collections/RecyclableCollectionVersion.cs
deleted file mode 100644
index 829e1a1..0000000
--- a/Recyclable.Collections/RecyclableCollectionVersion.cs
+++ /dev/null
@@ -1,90 +0,0 @@
-using System.Runtime.CompilerServices;
-
-namespace Recyclable.Collections
-{
-	public delegate void VersionChangedEventHandler();
-
-	public sealed class RecyclableCollectionVersion
-	{
-		//private ulong _enumeratorCount;
-
-		//private ulong _version;
-		//public ulong Version
-		//{
-		//	get => _version;
-			
-		//	set
-		//	{
-		//		_version = value;
-		//		_versionChanged?.Invoke(this, EventArgs.Empty);
-		//	}
-		//}
-
-		//public uint Version { get; set; }
-
-		public bool IsVersioned;
-
-		private VersionChangedEventHandler? _versionChanged;
-		public event VersionChangedEventHandler VersionChanged
-		{
-			[MethodImpl(MethodImplOptions.AggressiveInlining)]
-			add 
-			{ 
-				_versionChanged += value;
-				if (!IsVersioned)
-				{
-					IsVersioned = true;
-				}
-			}
-
-			[MethodImpl(MethodImplOptions.AggressiveInlining)]
-			remove
-			{
-				_versionChanged -= value;
-				if (_versionChanged == null)
-				{
-					IsVersioned = false;
-				}
-			}
-		}
-
-		[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		public void Inc()
-		{
-			if (IsVersioned)
-			{
-				_versionChanged!();
-			}
-			//_ = unchecked(Version++);
-		}
-
-		//[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		//public RecyclableCollectionVersion AddEnumerator()
-		//{
-		//	if (unchecked(_enumeratorCount++) == 0)
-		//	{
-		//		IsVersioned = true;
-		//	}
-
-		//	return this;
-		//}
-
-		//[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		//public void RemoveEnumerator()
-		//{
-		//	if (unchecked(--_enumeratorCount) == 0)
-		//	{
-		//		IsVersioned = false;
-		//	}
-		//}
-
-		[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		public RecyclableCollectionVersion Reset()
-		{
-			IsVersioned = false;
-			//Version = 0;
-			//_enumeratorCount = 0;
-			return this;
-		}
-	}
-}
diff --git a/Recyclable.Collections/RecyclableList.cs b/Recyclable.Collections/RecyclableList.cs
index 785cc2f..9fde854 100644
--- a/Recyclable.Collections/RecyclableList.cs
+++ b/Recyclable.Collections/RecyclableList.cs
@@ -1,5 +1,4 @@
-using Recyclable.Collections.Pools;
-using System.Buffers;
+using System.Buffers;
 using System.Collections;
 using System.Runtime.CompilerServices;
 
diff --git a/Recyclable.Collections/ThrowHelper.cs b/Recyclable.Collections/ThrowHelper.cs
index 9d4f218..8779ce6 100644
--- a/Recyclable.Collections/ThrowHelper.cs
+++ b/Recyclable.Collections/ThrowHelper.cs
@@ -4,31 +4,11 @@ namespace Recyclable.Collections
 {
 	internal static class ThrowHelper
 	{
-		/// <summary>
-		/// This is a helper method to throw <see cref="InvalidOperationException"/>, thrown when the collection was modified during enumeration.
-		/// </summary>
-		/// <exception cref="InvalidOperationException">Always</exception>
-		public static void ThrowListModifiedException()
-		{
-			Contract.EnsuresOnThrow<InvalidOperationException>(false);
-			throw new InvalidOperationException("Can't move to the next item, because the collection was modified. You must restart the enumeration by calling Reset(), if you want to enumerate the collection again");
-		}
-
-		/// <summary>
-		/// This is a helper method to throw <see cref="InvalidOperationException"/> with the given message.
-		/// </summary>
-		/// <exception cref="InvalidOperationException">Always</exception>
-		public static void ThrowInvalidOperationException(in string message)
-		{
-			Contract.EnsuresOnThrow<InvalidOperationException>(false);
-			throw new InvalidOperationException(message);
-		}
-
 		/// <summary>
 		/// This is a helper method to throw <see cref="ArgumentOutOfRangeException"/> with the given message.
 		/// </summary>
 		/// <exception cref="ArgumentOutOfRangeException">Always</exception>
-		public static void ThrowArgumentOutOfRangeException(in string argumentName, in string message)
+		public static void ThrowArgumentOutOfRangeException(string argumentName, string message)
 		{
 			Contract.EnsuresOnThrow<ArgumentOutOfRangeException>(false);
 			throw new ArgumentOutOfRangeException(argumentName, message);