How Can I Efficiently Await Multiple Asynchronous Tasks with Diverse Result Types?

Efficiently Handling Multiple Asynchronous Tasks with Varied Return Types

In asynchronous programming, it's frequent to need the results of several concurrently running tasks, each potentially returning a different data type. Let's illustrate with three example tasks:

• FeedCat(): Returns a Cat object.
• SellHouse(): Returns a House object.
• BuyCar(): Returns a Tesla object.

We need all results before continuing. While sequential execution is possible, concurrent execution is far more efficient. The challenge lies in handling the diverse result types.

Solution: Leveraging Task.WhenAll and Individual Awaits

The solution involves Task.WhenAll, which waits for all supplied tasks to finish. After completion, retrieve individual results using await:

<code class="language-csharp">var catTask = FeedCat();
var houseTask = SellHouse();
var carTask = BuyCar();

await Task.WhenAll(catTask, houseTask, carTask);

var cat = await catTask;
var house = await houseTask;
var car = await carTask;</code>

Task.WhenAll creates a parent task that only completes when all child tasks (catTask, houseTask, carTask) are finished. Subsequently, awaiting each child task individually retrieves its specific result.

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