How to create async thread?

Question

public async Task Update()  
{  
//code.  
}  

how to run it in thread？

I can not use like this: var thread =new Thread(Update); it must be void.

Answer 1

Your issue is that its an awaitable task, not that its void

var task = Task.Run(() => Update());   
await task;   

or simply:

await Task.Run(() => Update());   
   

Answer 2

Please read the following documents:

Async Programming : Introduction to Async/Await on ASP.NET
https://learn.microsoft.com/en-us/archive/msdn-magazine/2014/october/async-programming-introduction-to-async-await-on-asp-net

"Async and await on ASP.NET are all about I/O. They really excel at reading and writing files, database records, and REST APIs. However, they’re not good for CPU-bound tasks. You can kick off some background work by awaiting Task.Run, but there’s no point in doing so. In fact, that will actually hurt your scalability by interfering with the ASP.NET thread pool heuristics. If you have CPU-bound work to do on ASP.NET, your best bet is to just execute it directly on the request thread. As a general rule, don’t queue work to the thread pool on ASP.NET."

Avoid blocking calls
https://learn.microsoft.com/en-us/aspnet/core/performance/performance-best-practices?view=aspnetcore-6.0#avoid-blocking-calls

"Do not: Call Task.Run and immediately await it. ASP.NET Core already runs app code on normal Thread Pool threads, so calling Task.Run only results in extra unnecessary Thread Pool scheduling. Even if the scheduled code would block a thread, Task.Run does not prevent that."