Pourquoi n'attend pas sur Task.WhenAll lance une AggregateException?
Dans ce code: private async void button1_Click(object sender, EventArgs e) { try { await Task.WhenAll(DoLongThingAsyncEx1(), DoLongThingAsyncEx2()); } catch (Exception ex) { // Expect AggregateException, but got InvalidTimeZoneException } } Task DoLongThingAsyncEx1() { return Task.Run(() => {...