Async/Await vs. BackgroundWorker in .NET: When Should I Use Which?

.NET in .NC/AWAIT and BackgroundWorker: When will it be used?

.NET 4.5 and C# 5 introduced Async/Await, which triggered questions about the use cases with existing BackgroundWorker class. This article aims to clarify the difference between the two and guide the developers to choose the most suitable method for their scenes.

Async/Await: Asynchronous operation with a delayed thread

Async/Await allows the code to execute asynchronous without blocking the UI thread. It helps to deal with efficiently to do a lot of time to complete, thereby preventing no response interface. Await grammar enables developers to suspend the implementation until the asynchronous operation is completed. BackgroundWorker: Single task thread processing in the background

On the other hand, BackgroundWorker is designed for the task that needs to be performed in a separate thread pool (away from the UI thread). It provides progress reports and completion notification mechanisms.

Comparison and common scenes

Although Async/Await and BackgroundWorker serve different purposes and cannot be compared directly, in some cases, each method may be more suitable.

Async/Await Applicable Scene:

Non -blocking asynchronous operations that do not require progress reports (for example, network I/O)

The simple operation that has little effect on the response ability of the UI Scenes that are vital to use (or release) resources in asynchronous context

• BackgroundWorker Applicable Scene:
• The long -term operation that needs to be performed in the background

The task that requires progress reports or canceled

You need to drag and drop the background worksplay component on the design diagram

Involved a large amount of calculation or UI update, it requires thread delay

Conclusion
• Understand the functions and subtle functions of Async/Await and BackgroundWorker, so that developers can choose the most effective way for various scenarios. Async/Await provides simple grammar for asynchronous execution without blocking threads, while BackgroundWorker provides additional functions for progress reports and task management in individual threads.

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