What are asynchronous streams in C# 8.0?

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 IEnumerable<string> Message(){
   yield return "Hello!";
   yield return "Hello!";
}
Can be replaced by IAsyncEnumerable
static async IAsyncEnumerable<string> MessageAsync(){
   await Task.Delay(2000);
   yield return "Hello!";
   await Task.Delay(2000);
   yield return "Hello!";
}

Example

is translated as:

Example

class Program{
   public static async Task Main(){
      await foreach (var item in MessageAsync()){
         System.Console.WriteLine(item);
      }
      Console.ReadLine();
   }
   static async IAsyncEnumerable<string> MessageAsync(){
      await Task.Delay(2000);
      yield return "Hello!";
      await Task.Delay(2000);
      yield return "Hello!";
   }
}

Output

Hello!
Hello!

The above is the detailed content of What are asynchronous streams in C# 8.0?. For more information, please follow other related articles on the PHP Chinese website!