c# - 异常和返回语句是 C# 中唯一可能的提前退出吗？

Question

例如，我很好奇如果在下面的代码中，我可以确定 Foo() 或 Bar() 将被执行。

try {
    ... // Assume there is no return statement here
    Foo();
} catch (Exception e) {
    Bar();
}

我对 finally block 非常熟悉，不需要解释该功能。

我问是因为上面的代码不能在 Java 中工作，因为 Throwable 的存在，这是我通过艰难的方式发现的。

Answer 1

还有停止应用程序的“烧毁房屋”方法:

Environment.Exit(int code);
Environment.FailFast(string message);
Thread.CurrentThread.Abort();
AppDomain.Unload(AppDomain.CurrentDomain);

为了好玩，这里还有一个:)

[DllImport("kernel32.dll",SetLastError = true)]
static extern bool WriteProcessMemory(
      IntPtr hProcess, 
      IntPtr lpBaseAddress, 
      byte [] lpBuffer, 
      uint nSize, 
      out UIntPtr lpNumberOfBytesWritten);

var myProcess = Process.GetCurrentProcess();
var hProcess = myProcess.Handle;
var rnd = new Random();
while(true)
{
    var writeTo = new IntPtr((int)rnd.Next(0, int.MaxValue));
    var toWrite = new byte[1024];
    UIntPtr written;
    WriteProcessMemory(
        hProcess, 
        writeTo, 
        toWrite, 
        (uint)toWrite.Length, 
        out written);
}

出于好奇和刺激，让我们试驾一下吧!

我们的测试平台:

    static void Main(string[] args)
    {
        Trace.Listeners.Add(new ConsoleTraceListener());
        AppDomain.CurrentDomain.UnhandledException += OnNoes;
        try
        {
            // INSERT BURN STATEMENT
            Foo();
        }
        catch (Exception e)
        {
            Bar();
        }
        finally
        {
            Baz();
        }
    }

    static void Foo()
    {
        Trace.WriteLine("I AM FOO!");
    }
    static void Bar()
    {
        Trace.WriteLine("I AM BAR!");
    }
    static void Baz()
    {
        Trace.WriteLine("I AM BAZ!");
    }
    static void OnNoes(object sender, UnhandledExceptionEventArgs e)
    {
        Trace.WriteLine("OhNoes!");
    }

结果!

燃烧声明:

Thread.CurrentThread.Abort();

输出:

I AM BAR!
I AM BAZ!

燃烧声明:

AppDomain.Unload(AppDomain.CurrentDomain);

输出:

I AM BAR!
I AM BAZ!

燃烧声明:

Environment.Exit(-1);

输出:

Nothing! No trace output at all!

燃烧声明:

Environment.FailFast("Burn!!!");

输出:

Application crash! A FatalExecutionEngineError was thrown, 
which was not caught by any block/handler. No trace output.

就这样吧!什么？我错过了一个？

燃烧声明:

Splode();

“Splode”在哪里:

    static void Splode()
    {
        var myProcess = Process.GetCurrentProcess();
        var hProcess = myProcess.Handle;
        var rnd = new Random();
        while (true)
        {
            var writeTo = new IntPtr((int)rnd.Next(0, int.MaxValue));
            var toWrite = new byte[1024];
            UIntPtr written;
            WriteProcessMemory(
                hProcess,
                writeTo,
                toWrite,
                (uint)toWrite.Length,
                out written);
        }            
    }

输出:

Application crash! A FatalExecutionEngineError was thrown, 
which was not caught by any block/handler. No trace output.
Crashed Visual Studio while running attached!