How to start an async method without await its completion in C#?

How to start an async method without await its completion in C#?

To start an asynchronous method without waiting for its completion, you can simply invoke the method and not await it. This will start the method and immediately return control to the calling method, allowing it to continue executing while the asynchronous method runs in the background.

Here's an example:

public async Task MyAsyncMethod() { // Do some asynchronous work here } public void StartMyAsyncMethod() { MyAsyncMethod(); // Start the method without awaiting its completion // Do some other work here while MyAsyncMethod runs in the background }

In this example, MyAsyncMethod is declared as an asynchronous method that returns a Task. StartMyAsyncMethod invokes MyAsyncMethod without awaiting its completion, allowing it to run in the background. The method can continue doing other work while MyAsyncMethod runs.

Examples

1. "C# start async method without awaiting"

Code Implementation:

_ = MyAsyncMethod();

Description: Invokes MyAsyncMethod without awaiting its completion using the discard (_) operator.

2. "Fire and forget async method in C#"

Code Implementation:

Task.Run(() => MyAsyncMethod());

Description: Executes MyAsyncMethod in a new Task using Task.Run, allowing it to run asynchronously without blocking the calling code.

3. "Begin async operation without waiting"

Code Implementation:

_ = Task.Factory.StartNew(MyAsyncMethod);

Description: Initiates MyAsyncMethod using Task.Factory.StartNew, triggering it without waiting for completion.

4. "C# async method fire and forget with lambda"

Code Implementation:

Task.Run(async () => await MyAsyncMethod());

Description: Uses Task.Run with a lambda to asynchronously invoke and fire-and-forget MyAsyncMethod.

5. "Fire and forget async method with Task.Delay"

Code Implementation:

_ = MyAsyncMethod(); await Task.Delay(0); // Allows the method to continue asynchronously without waiting for MyAsyncMethod.

Description: Initiates MyAsyncMethod and uses Task.Delay(0) to allow the method to proceed asynchronously without blocking.

6. "Invoke async method without blocking UI in C#"

Code Implementation:

_ = Task.Run(async () => await MyAsyncMethod()).ConfigureAwait(false);

Description: Uses Task.Run with ConfigureAwait(false) to prevent blocking the UI while invoking MyAsyncMethod asynchronously.

7. "C# start async method in a separate thread"

Code Implementation:

ThreadPool.QueueUserWorkItem(async _ => await MyAsyncMethod());

Description: Utilizes ThreadPool.QueueUserWorkItem to start MyAsyncMethod in a separate thread.

8. "Fire and forget async method with async lambda"

Code Implementation:

_ = Task.Run(async () => { await MyAsyncMethod(); }).ConfigureAwait(false);

Description: Initiates MyAsyncMethod with Task.Run and a lambda, configured to not capture the synchronization context (ConfigureAwait(false)).

9. "C# start async method without waiting in a Windows Service"

Code Implementation:

Task.Run(() => MyAsyncMethod()).ConfigureAwait(false).GetAwaiter().GetResult();

Description: In a Windows Service, starts MyAsyncMethod using Task.Run and ensures non-blocking behavior using ConfigureAwait(false) and GetAwaiter().GetResult().

10. "Async method fire and forget in ASP.NET Core"

Code Implementation:

_ = MyAsyncMethod();

Description: In an ASP.NET Core application, starts MyAsyncMethod without waiting for completion.

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