public async Task <long> CheckAwaitBehaviourWithAwaitAtTheEndWithSleep()
{
var watch = Stopwatch.StartNew();
var task1 = _asyncService.WaitReturnString().ConfigureAwait(false);
var task2 = _asyncService.WaitReturnString().ConfigureAwait(false);
var task3 = _asyncService.WaitReturnString().ConfigureAwait(false);
MockMethod(await task1, await task2, await task3);
watch.Stop();
return(watch.ElapsedMilliseconds);
}