Welcoming Task.WhenEach in .NET 9: A Game-Changer for Asynchronous Programming ??

.NET 9 brings an exciting new feature that promises to significantly enhance the developer experience: Task.WhenEach. This addition simplifies the handling of asynchronous tasks, making our code more readable, maintainable, and efficient. Let's dive into why this feature is a game-changer for .NET developers.

The Challenge with Asynchronous Programming

Asynchronous programming is a powerful tool in a developer's arsenal, enabling applications to perform tasks concurrently, thus improving performance and responsiveness. However, managing multiple tasks concurrently often leads to boilerplate code and complex logic to handle tasks as they complete.

Traditionally, we use Task.WhenAll or Task.WhenAny to manage multiple tasks. While these methods are effective, they often require additional code to handle each task's completion, especially when you need to process results as soon as individual tasks finish. This can lead to convoluted and less maintainable code.

Introducing Task.WhenEach

.NET 9's Task.WhenEach addresses these issues head-on. This new method allows developers to handle tasks as they complete, streamlining asynchronous workflows and reducing boilerplate code.

How Does It Work?

The Task.WhenEach method takes a collection of tasks and returns a new task that completes each time one of the provided tasks completes. This allows you to process the results of each task as soon as they are available, without waiting for all tasks to finish.

Here's a simple example:

var tasks = new List<Task<int>>

{

Task.Run (() => 1),

Task.Run (() => 2),

Task.Run (() => 3)

};

await foreach (var result in Task.WhenEach(tasks))

{

Console.WriteLine(result);

}