Async function in another window-CodePudding

I'm having issues with running a function as async. I'm trying to make an async call to set up some timmers to run some code. I've tried making the function async and I feel like I'm doing something wrong. I've narrowed down the functionality to two functions and added a 20-second sleep in the function to test out the issue and I'm wondering if my sleep is pausing the whole application or am I doing async incorrectly? Any point in the right direction would be helpful. Thank you in advance.

private async void RunAsyncExample(){
    Task timersTask = mainWindow.StartTimers();   //This has a 20 sec sleep
    mainWindow.PullReceipt(handoff);              //This should not wait
    await timersTask;                             //This should wait
}

Below is the mainWindow.StartTimers

public async Task<Task> StartTimers()
{
    _log.LogError("starting timer");
    System.Threading.Thread.Sleep(20000);
    _log.LogError("ending timer");
    return Task.CompletedTask;
}

CodePudding user response：

Try the following:

public async Task StartTimers()
{
    _log.LogError("starting timer");
    await Task.Delay(20000);
    _log.LogError("ending timer");
}

Incidentally, your code has many issues:

You should not declare an async method if it doesn't await
You should not Sleep
You should put non UI code outside UI
You should name methods properly. StartTimers doesn't start any timer, so it is not an appropriate name.
async void is appropriate only for asynchronous event handlers