How to implement waiting for a method to execute without using a while loop?

Question

.NET

Hello!
I have two separate services that are somehow interconnected. To one I send requests via HTTP, and from the other I expect a response via web sockets.
It works like this:

static async void Run()
{
   await SendMessageToServer(); // отправить запрос по HTTP
   WaitResponseFromWebSocket(); // ожидать ответа по веб сокету
}

Question: how to make sure that the Run () method does not complete until the response from the web socket arrives? Is it possible to track the status of a web socket response without using a while loop?
I tried to do it through AutoResetEvent, but my Run () method is launched through Task.Run, and for some reason WaitOne () does not work in that place.

Answer 1

If I understand correctly, the websocket message handler is running somewhere else. You can create a common TaskCompletionSource and call in the Run method await tcs.Task;, and when a message arrives on the socket, call tcs.SetResult();.

Answer 2

Websocket can send your message in parts and in any case you will have to do while until you get the state EndOfMessage == true.