Incorrect stacktrace by rethrow

Question

I rethrow an exception with \"throw;\", but the stacktrace is incorrect:

static void Main(string[] args) {
    try {
        try {
            throw new Exce         


        

Answer 1

OK, there seems to be a bug in the .NET Framework, if you throw an exception, and rethrow it in the same method, the original line number is lost (it will be the last line of the method).

Fortunatelly, a clever guy named Fabrice MARGUERIE found a solution to this bug. Below is my version, which you can test in this .NET Fiddle.

private static void RethrowExceptionButPreserveStackTrace(Exception exception)
{
    System.Reflection.MethodInfo preserveStackTrace = typeof(Exception).GetMethod("InternalPreserveStackTrace",
      System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
    preserveStackTrace.Invoke(exception, null);
      throw exception;
}

Now catch the exception as usually, but instead of throw; just call this method, and voila, the original line number will be preserved!