public delegate Task SomeEventHandler(SomeEventArgs e);

...


public event SomeEventHandler OnSomething;

订阅者(多个)

some.OnSomething += DoSomething;

...

public async Task DoSomething(SomeEventArgs e) {
    await SomethingElse();
    e.A = true;
}

事件电话

if (this.OnSomething != null)
    await this.OnSomething(args);

// Here args.A is false
// It should be true

问题是即使DoSomething没有完成,最后一部分也会继续.会出现什么问题？