Async and Await Operation

Hari p

3y929C#

I need a clear Explanation About async and await in C# Can Anyone Elaborate deeply?

5 Replies

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Amit Mohanty3y ago
Accepted answer
In C#, the async and await keywords provide a convenient way to work with asynchronous code in a more readable and organized manner.

The async keyword is used to mark a method as asynchronous. An asynchronous method contains one or more await expressions and usually returns a Task or Task object. This indicates that the method can execute asynchronously and won't block the calling thread while it's waiting for certain operations to complete.

The await keyword is used within an asynchronous method to pause the execution of that method until the awaited task is complete. The task being awaited must be an instance of a type that represents an asynchronous operation, such as Task, Task, or other awaitable types.

Here's an example:
```
public async Task MainAsync()
{
    Console.WriteLine("Starting MainAsync");

    await OperationAsync();

    Console.WriteLine("MainAsync Completed");
}

public async Task OperationAsync()
{
    Console.WriteLine("OperationAsync Started");

    // Simulate a delay
    await Task.Delay(TimeSpan.FromSeconds(2));

    Console.WriteLine("OperationAsync Completed");
}

public static void Main()
{
    var task = MainAsync();
    task.Wait(); // Waiting for MainAsync to complete
}
```
In this example MainAsync & OperationAsync is marked as asynchronous with the async keyword. OperationAsync method includes a simulated delay using Task.Delay. Within MainAsync, the await OperationAsync() call will pause the execution of MainAsync until OperationAsync completes.

The async and await are not meant to make your code run faster; they're designed to make your application more responsive by better utilizing resources and allowing concurrent execution of tasks that might otherwise block the main thread.
+4
Mohammad Hussain3y ago
1. async and await:
  
  async: The async keyword is used to mark a method as asynchronous. This indicates that the method contains asynchronous operations and will likely use the await keyword to manage them.
  
  await: The await keyword is used within an async method to pause the method's execution and asynchronously wait for the completion of an asynchronous operation. It allows the method to yield control back to the calling thread while the awaited operation is performed in the background.
2. How async and await Work Together: When you mark a method with the async keyword, you can use await to indicate points where you want to pause the method's execution and await the completion of asynchronous tasks. While awaiting a task, the calling thread is free to perform other tasks, making efficient use of system resources.
Benefits:
- Improved Responsiveness: Asynchronous programming prevents UI freezing and unresponsiveness in applications.
- Efficient Resource Utilization: Threads are not blocked, and the system can perform other tasks while waiting.
- Scalability: Asynchronous code can handle a higher number of concurrent requests compared to synchronous code.
+3
Cr Bhargavi3y ago
The async keyword is used to for asynchronous. An asynchronous method has more await expressions

The await keyword is used within an asynchronous method to pause the execution of that method until the awaited task is complete.
+2
Vishal Yelve3y ago
Hi Hari,

do refer below links

https://www.bytehide.com/blog/async-await-csharp

https://dotnettutorials.net/lesson/async-and-await-operator-in-csharp/

Kudvenket Video - https://www.youtube.com/watch?v=C5VhaxQWcpE

Shivprasad koirala Sir /Questpond video - https://www.youtube.com/watch?v=V2sMXJnDEjM&pp=ygUVYXN5bmMgYW5kIGF3YWl0IGluIGMj
+2
Tahir Ansari3y ago
https://www.c-sharpcorner.com/article/async-and-await-in-c-sharp/

https://dotnettutorials.net/lesson/async-and-await-operator-in-csharp/
+2