Async / Await

Async and Await in C# are used for asynchronous programming, allowing tasks to run without blocking the main program. This helps improve performance and responsiveness, especially in modern applications.

What is Async / Await

Async and Await are keywords in C# used to handle long-running operations like file access, database calls, or web requests without freezing the application.

Why Async / Await is Used

They allow programs to perform multiple operations efficiently without waiting for each task to complete before moving to the next.

How Async / Await Works

The async keyword is used to define a method as asynchronous. The await keyword pauses the method execution until the task completes, without blocking the main thread.

Async Method

An async method returns a Task or Task<T> and allows asynchronous operations inside it.

Await Keyword

Await is used to wait for a task to complete while allowing other operations to continue.

Non-Blocking Execution

Async programming ensures that the application remains responsive, especially in UI and web applications.

Importance of Async / Await

It improves application performance, enhances user experience, and allows efficient resource utilization.

Real World Usage

Async and Await are used in web APIs, database operations, file handling, network calls, and cloud applications.

Advantages

Improves performance
Keeps applications responsive
Efficient resource usage
Simplifies asynchronous code
Supports modern programming

Common Mistakes

Forgetting to use await
Blocking async code with synchronous calls
Not handling exceptions properly
Overusing async unnecessarily
Ignoring task results

Best Practices

Use async for long-running tasks
Always use await properly
Handle exceptions carefully
Avoid blocking calls like .Result or .Wait()
Write clean and readable async code

Lesson Summary

Async and Await in C# enable non-blocking operations, making applications faster and more responsive. They are essential for modern software development.