AnonymousDisposable Equivalent to .

 CollectionDisposable Disposes a collection of disposables.

 Disposable A disposable that executes a delegate when disposed.

 NoopDisposable A singleton disposable that does nothing when disposed.

 ReferenceCountedDisposable Creation methods for reference counted disposables.

 SingleDisposable`1 A base class for disposables that need exactly-once semantics in a thread-safe way. All disposals of this instance block until the disposal is complete.

 SingleNonblockingDisposable`1 A base class for disposables that need exactly-once semantics in a thread-safe way.

 IReferenceCountedDisposable`1 An instance that represents a reference count. All members are threadsafe.

 IWeakReferenceCountedDisposable`1 An instance that represents an uncounted weak reference. All members are threadsafe.