Asynchronous Programming with Async and Await

Asynchronous Programming with Async and Await

• Asynchronous Programming is introduced in VS 2012.
• It's support .NET FRAMEWORK 4.5 and Windows Runtime.
• application retains a logical structure that resembles synchronous code.
• Asynchronous is essential for activities that are potentially blocking, such as when your application accesses the web.
• In an asynchronous process, the application can continue with other work that doesn't depend on the web resource until the potentially blocking task finishes.
• The Async and Await keywords in Visual Basic 
• By using those two keywords, you can use resources in the .NET Framework or the Windows Runtime to create an asynchronous method almost as easily as you create a synchronous method.
• Asynchronous methods that you define by using async and await are referred to as async methods.
• Async methods are intended to be non-blocking operations.
• An await expression in an async method doesn't block the current thread while the awaited task is running.
• Instead, the expression signs up the rest of the method as a continuation and returns control to the caller of the async method.