async/await Model View Presenter winforms

我有一个winforms应用程序，它使用了这篇文章中描述的MVP模式http://www.codeproject.com/Articles/563809/UIplusDesignplusUsingplusModel-View-Presenter我正在将我的应用程序转换为async/await，但我有问题。

这里有一个例子来说明我的问题

public interface IView
{
    event Action DoSomething;
}
public partial class MyForm : Form, IView
{
    public event Action DoSomething;
    public MyForm() 
    {
        InitializeComponent();
    }
    private async void OnSomeButtonClick(object sender, EventArgs e)
    {
        if (DoSomething!= null)
        {
            try
            {
                await DoSomething();
                SomeOtherMethod();
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }   
    }
}
public class MyPresenter
{
    private readonly IView _view;
    private ClassWithAwaitbleMethods _foo;
    public MyPresenter(IView view)
    {
        _view = view;
        _view.DoSomething += OnDoSomething;
        _foo = new ClassWithAwaitableMethods();
    }
    public async void OnDoSomething()
    {
        //this may throw an exception
        await _foo.SomeAwaitableWork1();
    }
}
public class MySecondPresenter
{
    private readonly IView _view;
    private ClassWithAwaitbleMethods _foo;
    public MySecondPresenter(IView view)
    {
        _view = view;
        _view.DoSomething += OnDoSomething;
        _foo = new AnotherClassWithAwaitableMethods();
    }
    public async void OnDoSomething()
    {
        //this may throw an exception
        await _foo.SomeAwaitableWork2();
    }
}

这段代码没有正确地等待，当抛出异常时，它没有被捕获。这是因为async void。当这段代码不是async/await时，异常被很好地捕获。

我知道async void是一个禁忌，除了顶级事件，但我的应用程序的设计方式，我不能真的绕过它。当我只有一个订阅者时，我将IView接口更改为

public interface IView
{
    Func<Task> DoSomething {get; set;};
}

然后像这样连接起来

public MyPresenter(IView view)
{
        _view = view;
        _view.DoSomething = OnDoSomething;
        _foo = new ClassWithAwaitableMethods();
}

虽然有点粗糙，但是可以正确地等待并捕获异常。如有任何帮助或见解，我将不胜感激。

// An instance of this is passed into the concrete view.
public interface IViewImplementation
{
  void DoSomething();
  // Or the async equivalent:
  //   Task DoSomethingAsync();
}