C#: What is the difference between async void and async Task?

async Task — awaitable. async void — fire-and-forget.

async Task:

• Awaitable.
• Error handling.
• Testable.

async void:

• Fire-and-forget.
• Unhandled exceptions.
• Event handlers only.

1// async Task — preferred
2public async Task ProcessAsync()
3{
4    await DoWork();
5}
6
7// async void — only for events
8private async void OnButtonClick(object sender, EventArgs e)
9{
10    await DoWork();
11}

Key: async Task for methods, async void for events.