AsyncEnumerable`1 Helps to enumerate items in a collection asynchronously

 AsyncEnumerableWithState`2 Similar to , but allows you to pass a state object into the enumeration function, what can be used for performance optimization, so don't have to create a delegate on the fly every single time you create the enumerator.

 AsyncEnumerationCanceledException This exception is thrown when you call or when the enumerator is disposed before reaching the end of enumeration.

 AsyncEnumerator`1 Helps to enumerate items in a collection asynchronously

 AsyncEnumeratorWithState`2 Helps to enumerate items in a collection asynchronously. Provides exactly the same functionality as , but allows to pass a user state object in the enumeration function, what can be used for performance optimization.

 ParallelForEachException Used in ParallelForEachAsync<T> extension method

 AsyncEnumerableAdapterExtensions Extension methods for for backward compatibility with version 1 of this libraray. Not recommended to use.

 ForEachAsyncExtensions Enables asynchronous 'foreach' enumeration over an IAsyncEnumerable

 IAsyncEnumerableExtensions Extension methods for interface

 IAsyncEnumeratorExtensions Extension methods for interface

 ParallelForEachExtensions Extensions methods for IEnumerable and IAsyncEnumerable to do parallel for-each loop in async-await manner

 AsyncEnumerable Base abstract class that implements . Use concrete implementation or .

 AsyncEnumerator Base type for and

 IAsyncEnumerable Exposes an asynchronous enumerator, which supports a simple iteration over a non-generic collection

 IAsyncEnumerable`1 Exposes the asynchronous enumerator, which supports a simple iteration over a collection of typed items

 IAsyncEnumerator Supports a simple asynchronous iteration over a non-generic collection

 IAsyncEnumerator`1 Supports a simple asynchronous iteration over a collection of typed items