RecyclableList.BlockCount renamed => RecyclableList.ReservedBlockCount. Fixed to always include the last block.

RecyclableList.LastTakenBlockIndex property added for some scenarios.

RecyclableList.IndexOf & .LongIndexOf fixed to use the correct index.

RecyclableArrayList.AddRange(RecyclableList<T> items) fixed to use the correct index.

Some test cases excluded, where needed.

Recyclable.CollectionsTests/RecyclableListTests.cs

@@ -291,8 +291,13 @@ namespace Recyclable.CollectionsTests
 
 		[Theory]
 		[MemberData(nameof(RecyclableListTestData.SourceTargetDataVariants), MemberType = typeof(RecyclableListTestData))]
-		public void RemoveShouldRaiseNotSupportedException(string testCase, IEnumerable<long> testData, long itemsCount, int targetBlockSize)
+		public void RemoveShouldRaiseNotSupportedExceptionWhenNotLastItem(string testCase, IEnumerable<long> testData, long itemsCount, int targetBlockSize)
 		{
+			if (itemsCount is 0 or 1)
+			{
+				return;
+			}
+
 			// Prepare
 			using var list = new RecyclableList<long>(testData, minBlockSize: targetBlockSize);
 
@@ -302,8 +307,13 @@ namespace Recyclable.CollectionsTests
 
 		[Theory]
 		[MemberData(nameof(RecyclableListTestData.SourceTargetDataVariants), MemberType = typeof(RecyclableListTestData))]
-		public void RemoveAtShouldRaiseNotSupportedException(string testCase, IEnumerable<long> testData, long itemsCount, int targetBlockSize)
+		public void RemoveAtShouldRaiseNotSupportedExceptionWhenNotLastItem(string testCase, IEnumerable<long> testData, long itemsCount, int targetBlockSize)
 		{
+			if (itemsCount is 0 or 1)
+			{
+				return;
+			}
+
 			// Prepare
 			using var list = new RecyclableList<long>(testData, minBlockSize: targetBlockSize);
 
@@ -530,6 +540,11 @@ namespace Recyclable.CollectionsTests
 		[MemberData(nameof(RecyclableListTestData.SourceTargetDataVariants), MemberType = typeof(RecyclableListTestData))]
 		public void LongIndexOfShouldNotFindNonExistingItems(string testCase, IEnumerable<long> testData, long itemsCount, int targetBlockSize)
 		{
+			if (itemsCount == 0)
+			{
+				return;
+			}
+
 			// Prepare
 			using var list = new RecyclableList<long>(testData, minBlockSize: targetBlockSize);
 			_ = testData.Any().Should().BeTrue("we need items on the list that we can look for");