Async and await file processing

With acync and await, developers can keep their applications fully responsive while performing intensive tasks such as file processing. This makes a perfect candidate for using asynchronous code. If you have several large files that need copying, an async and await method would be a perfect solution for keeping your form responsive.

Getting ready

Ensure that you have added the following using statements to the top of your code file:

using System.IO;
using System.Threading;

For asynchronous code to work, we need to include the threading namespaces.

How to do it...

1. Create two folders called AsyncDestination and AsyncSource:

2. To the AsyncSource folder, add a couple of large files to process:

3. Create a new WinForms application and add a forms times control, a button, and a label called lblTimer to the form. Call the timer asyncTimer and set its Interval to 1000 milliseconds (1 second):

4. In the code above the constructor, add the CancellationTokenSource object and the elapsedTime...