我自己的异常处理程序仍会引发异常并使应用程序崩溃

Winforms应用程序。这是主要的：

  static class Program
{
    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);

        // Add handler for UI thread exceptions
        Application.ThreadException += new ThreadExceptionEventHandler(UIThreadException);

        // Force all WinForms errors to go through handler
        Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);

        // This handler is for catching non-UI thread exceptions
        AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);

        Application.Run(new Form1());
    }

    private static void CurrentDomain_UnhandledException(Object sender, UnhandledExceptionEventArgs e)
    {
            Exception ex = (Exception)e.ExceptionObject;
            MessageBox.Show("Unhadled domain exception:\n\n" + ex.Message);

            Application.Exit();


        // It should terminate our main thread so Application.Exit() is unnecessary here
    }

    private static void UIThreadException(object sender, ThreadExceptionEventArgs t)
    {
         MessageBox.Show("Unhandled exception catched.\n Application is going to close now.");


        // Here we can decide if we want to end our application or do something else
        Application.Exit();
    }
}

这是我故意产生异常的地方

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            int zero = 0;
            //int number = 1 / zero;

            throw new System.IO.FileNotFoundException();
        }
    }

堆栈跟踪：

    System.IO.FileNotFoundException was unhandled
  HResult=-2147024894
  Message=Unable to find the specified file.
  Source=NewPostSharpSolution
  StackTrace:
       at NewPostSharpSolution.Form1..ctor() in C:\Users\Joao\Documents\Visual Studio 2015\Projects\NewPostSharpSolution\NewPostSharpSolution\Form1.cs:line 21
       at NewPostSharpSolution.Program.Main() in C:\Users\Joao\Documents\Visual Studio 2015\Projects\NewPostSharpSolution\NewPostSharpSolution\Program.cs:line 30
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

处理程序显示异常的消息框，但仍会中断应用程序...

我有什么想念的吗？我以为实现此处理程序将让我决定如何处理异常？