几年后,事情变得更容易了.现在可以省略
Register()属性,在应用程序和应用程序委托上,而是使用：

UIApplication.Main(args,typeof(CustomApp),typeof(CustomAppDelegate));

为了能够覆盖UIApplication.SendEvent(),我想要子类化UIApplication：

public class UIApplicationMain : UIApplication
{
    public UIApplicationMain () : base()
    {
    }
 
    public override void SendEvent (UIEvent uievent)
    {
        base.SendEvent (uievent);
    }
}

在main.cs中我使用以下代码：

public class Application
{
    static void Main (string[] args)
    {
        UIApplication.Main (args,"UIApplicationMain","AppDelegateBase");
    }
}

但它失败了：

06002

NSInternalInconsistencyException Reason: Unable to instantiate the
UIApplication subclass instance. No class named UIApplicationMain is
loaded.

所以我猜错了一些属性.但是在哪里和哪里？