在C#WinForms中提升自定义事件

public class CustomEventArgs : EventArgs
{
    public string Message { get; set; }

    public CustomEventArgs(string message)
    {
        Message = message;
    }
}

public class EventSource
{
    public event EventHandler<CustomEventArgs> CustomEvent;

    protected virtual void OnCustomEvent(CustomEventArgs e)
    {
        CustomEvent?.Invoke(this, e);
    }
}

public class EventSubscriber
{
    public EventSubscriber(EventSource eventSource)
    {
        eventSource.CustomEvent += OnCustomEvent;
    }

    private void OnCustomEvent(object sender, CustomEventArgs e)
    {
        Console.WriteLine($"Custom event raised: {e.Message}");
    }
}

public class EventSource
{
    public void RaiseCustomEvent()
    {
        OnCustomEvent(new CustomEventArgs("Hello, world!"));
    }
}

public static void Main(string[] args)
{
    EventSource eventSource = new EventSource();
    EventSubscriber eventSubscriber = new EventSubscriber(eventSource);

    eventSource.RaiseCustomEvent();
}