Add comments on public classes and methods

##### Platform.Collections

- [ ] [BitString](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/BitString.cs)
- [ ] [BitStringExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/BitStringExtensions.cs)
- [ ] [EnsureExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/EnsureExtensions.cs)
- [ ] [ICollectionExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/ICollectionExtensions.cs)
- [ ] [IDictionaryExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/IDictionaryExtensions.cs)
- [x] [StringExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/StringExtensions.cs)

##### Platform.Collections/Arrays

- [x] [ArrayFiller\[TElement, TReturnConstant\]](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Arrays/ArrayFiller%5BTElement%2C%20TReturnConstant%5D.cs)
- [ ] [ArrayFiller\[TElement\]](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Arrays/ArrayFiller%5BTElement%5D.cs)
- [ ] [ArrayPool](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Arrays/ArrayPool.cs)
- [ ] [ArrayPool\[T\]](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Arrays/ArrayPool%5BT%5D.cs)
- [ ] [ArrayString](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Arrays/ArrayString.cs)
- [ ] [CharArrayExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Arrays/CharArrayExtensions.cs)
- [x] [GenericArrayExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Arrays/GenericArrayExtensions.cs)

##### Platform.Collections/Concurrent

- [ ] [ConcurrentQueueExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Concurrent/ConcurrentQueueExtensions.cs)
- [ ] [ConcurrentStackExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Concurrent/ConcurrentStackExtensions.cs)

##### Platform.Collections/Lists

- [x] [CharIListExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Lists/CharIListExtensions.cs)
- [x] [IListComparer](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Lists/IListComparer.cs)
- [x] [IListEqualityComparer](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Lists/IListEqualityComparer.cs)
- [x] [IListExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Lists/IListExtensions.cs)
- [x] [ListFiller](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Lists/ListFiller.cs)

##### Platform.Collections/Segments

- [ ] [CharSegment](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Segments/CharSegment.cs)
- [ ] [Segment](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Segments/Segment.cs)

##### Platform.Collections/Segments/Walkers

- [ ] [AllSegmentsWalkerBase](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Segments/Walkers/AllSegmentsWalkerBase.cs)
- [ ] [AllSegmentsWalkerBase\[T, TSegment\]](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Segments/Walkers/AllSegmentsWalkerBase%5BT%2C%20TSegment%5D.cs)
- [ ] [AllSegmentsWalkerBase\[T\]](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Segments/Walkers/AllSegmentsWalkerBase%5BT%5D.cs)
- [ ] [AllSegmentsWalkerExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Segments/Walkers/AllSegmentsWalkerExtensions.cs)
- [ ] [DictionaryBasedDuplicateSegmentsWalkerBase\[T, Segment\]](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Segments/Walkers/DictionaryBasedDuplicateSegmentsWalkerBase%5BT%2C%20Segment%5D.cs)
- [ ] [DictionaryBasedDuplicateSegmentsWalkerBase\[T\]](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Segments/Walkers/DictionaryBasedDuplicateSegmentsWalkerBase%5BT%5D.cs)
- [ ] [DuplicateSegmentsWalkerBase\[T, TSegment\]](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Segments/Walkers/DuplicateSegmentsWalkerBase%5BT%2C%20TSegment%5D.cs)
- [ ] [DuplicateSegmentsWalkerBase\[T\]](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Segments/Walkers/DuplicateSegmentsWalkerBase%5BT%5D.cs)

##### Platform.Collections/Sets

- [ ] [ISetExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Sets/ISetExtensions.cs)
- [ ] [SetFiller](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Sets/SetFiller.cs)

##### Platform.Collections/Stacks

- [ ] [DefaultStack](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Stacks/DefaultStack.cs)
- [ ] [IStack](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Stacks/IStack.cs)
- [ ] [IStackExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Stacks/IStackExtensions.cs)
- [ ] [IStackFactory](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Stacks/IStackFactory.cs)
- [ ] [StackExtensions](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Stacks/StackExtensions.cs)

##### Platform.Collections/Trees

- [ ] [Node](https://github.com/linksplatform/Collections/blob/master/csharp/Platform.Collections/Trees/Node.cs)