standards-c-sharp

Use await Task.WhenAny/All instead of Task.WaitAny/All

To wait for tasks to finish, use await Task.WhenAll/Any instead of Task.WaitAll/Any or Task.Result. The latter blocks the thread while the tasks complete, defeating the purpose of using async.

Don’t

var task1 = DownloadFileAsync("...");
var task2 = DownloadFileAsync("...");
Task.WaitAll(task1, task2); // blocks

Do

var task1 = DownloadFileAsync("...");
var task2 = DownloadFileAsync("...");
await Task.WhenAll(task1, task2); // does not block

This site is open source. Improve this page.