C# 8.0 introduces async streams, which model a streaming source of data. Data Streams typically retrieve or generate elements asynchronously.
Code that generates sequences can now use yield return to return elements
Methods declared using the async modifier.
We can use await foreach loop to consume asynchronous streams.
The following is the syntax:
static IEnumerableMessage(){ yield return "Hello!"; yield return "Hello!"; } Can be replaced by IAsyncEnumerable static async IAsyncEnumerable MessageAsync(){ await Task.Delay(2000); yield return "Hello!"; await Task.Delay(2000); yield return "Hello!"; }
class Program{ public static async Task Main(){ await foreach (var item in MessageAsync()){ System.Console.WriteLine(item); } Console.ReadLine(); } static async IAsyncEnumerable MessageAsync(){ await Task.Delay(2000); yield return "Hello!"; await Task.Delay(2000); yield return "Hello!"; } }
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