How do I use async and await in C#?

How do I use async and await in C#?

In C#, you can use the async keyword to define an asynchronous method. Inside this method, you can use the await keyword to call other asynchronous methods. This allows your program to run tasks without blocking the main thread.

Can you give me a simple example?

Sure! Here's a simple example:

public async Task<string> GetDataAsync() {
    await Task.Delay(1000); // Simulates a delay
    return "Data retrieved!";
}

What happens if I don't use await?

If you don't use await, the method will return a Task immediately, and the code after the await will run asynchronously. This can lead to unexpected behavior if you're not careful.

Are there any best practices for using async in C#?

Yes, some best practices include:

1. Always use async and await together.
2. Avoid blocking calls like .Result or .Wait().
3. Use ConfigureAwait(false) in library code to avoid deadlocks.