finally doesn't seem to execute in C# console

问题:

int i=0;
try{
    int j = 10/i;
}
catch(IOException e){}
finally{
    Console.WriteLine("In finally");
    Console.ReadLine();
}

The finally block does not seem to execute when pressing F5 in VS2008. I am using this code in Console Application.

回答1:

The Visual Studio debugger halts execution when you get an uncaught exception (in this case a divide by zero exception). In debug mode Visual Studio prefers to break execution and give you a popup box at the source of the error rather than letting the application crash. This is to help you find uncaught errors and fix them. This won't happen if you detach the debugger.

Try running it in release mode from the console without the debugger attached and you will see your message.

回答2:

If you want it to execute while debugging there are two things you can do:

1) Catch the correct exception:

    int i = 0;
    try
    {
        int j = 10 / i;
    }
    catch(DivideByZeroException e){}
    finally
    {
        Console.WriteLine("In finally");
        Console.ReadLine();
    }

2) Tell Visual Studio to ignore unhandled exceptions. Go to Debug-->Exceptions, and then you can uncheck the Common Language Runtime Exceptions "User-unhandled" option, or you can expand that node, and uncheck individual exception types.

回答3:

F5 continues the application till the next breakpoint or unhandled exception.

I think you should use F10 rather for step debugging or turn on breaking for all exceptions (handled or not).

回答4:

Don't run you application via F5. In Debug mode you can't skip exception, message box will pop-up again and again.

Instead build it and run via CMD, Far Manager, etc

回答5:

As the final conclusion we all should agree, if there is an unhandled exception and the application is running in Debugging mode, finally won't get executed.