Question

I have C# application. I can compile it in debug mode, with any flags etc. if required.

After some point it doesn’t function properly (significant slow-down, partly hangs etc. etc.)

Obviously something goes wrong. As a first try I want to see complete list of all exceptions that hapened anywhere during program execution (caught and uncaught). Is it possible? I know there is an option in VS that allows me to “brekpoint” at certain exception. But I don’t want to “breakpoint”, instead I want to “log” all happened exceptions so I can analyze them later.

Answer 1

Try to use UnhandledException in you application if you are not sure where exceptions can occur possibly.

The UnhandledException event handles uncaught exceptions thrown from the main UI thread. The ThreadException event handles uncaught exceptions thrown from non-UI threads.

static void Main(string[] args)
{      
    AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
    //... do something ...      
}

static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
{
      System.Diagnostics.Trace.WriteLine((e.ExceptionObject as Exception).Message, "Unhandled UI Exception");
      // here you can log the exception ...
}

I have used Trace class on MSDN for logging:

System.Diagnostics.Trace

This includes listeners that listen for your Trace() methods, and then write to a log file/output window/event log, ones in the framework that are included are DefaultTraceListener, TextWriterTraceListener and the EventLogTraceListener. It allows you to specify levels (Warning,Error,Info) and categories.