This content originally appeared on DEV Community and was authored by Sandeep Borhade
Lot of time I have been asked the question around Async and Await during interviews.
Here is I am trying to consolidate my understanding around these keywords with some snippets.
What is Asynchronous Programming?:
In Asynchronous programming methods are run without blocking the main thread.
**Async **Keyword: Marks a method as asynchronous, allowing the use of await.
**Await **Keyword: Suspends execution until the awaited task is complete.
Task and Task: Core types representing asynchronous operations.
Why Use await in Methods?
The await keyword is used to pause execution of the calling method until the awaited asynchronous operation completes. This allows other tasks (like UI updates or other background operations) to run without blocking the thread.
When Not to Use await
In some cases, you might not need await:
Fire-and-Forget: When the result of a task isn’t needed, you can call it without await.
LogDataAsync("Message"); // Fire-and-forget (but use cautiously)
Aggregating Multiple Tasks: You can combine tasks using Task.WhenAll without awaiting each individually.
var tasks = new[] { Task1(), Task2() };
await Task.WhenAll(tasks);
Returning Tasks: When a method simply returns a task to its caller, you don't need await unless you want to handle exceptions or perform additional work.
static Task<string> FetchDataAsync() => Task.FromResult("Data");
This content originally appeared on DEV Community and was authored by Sandeep Borhade
Sandeep Borhade | Sciencx (2025-01-25T03:20:04+00:00) Understanding Async and Await in C#. Retrieved from https://www.scien.cx/2025/01/25/understanding-async-and-await-in-c/
Please log in to upload a file.
There are no updates yet.
Click the Upload button above to add an update.