How can I rethrow an Inner Exception while maintaining the stack trace generated so far?

Question

Duplicate of: In C#, how can I rethrow InnerException without losing stack trace?

I have some operations that I invoke asynchronously on a background thread. Sometimes,

Answer 1

It is possible with .net 4.5:

catch(Exception e)
{
   ExceptionDispatchInfo.Capture(e.InnerException).Throw();
}

Answer 2

There is a way of "resetting" the stack trace on an exception by using the internal mechanism that is used to preserve server side stack traces when using remoting, but it is horrible:

try
{
    // some code that throws an exception...
}
catch (Exception exception)
{
    FieldInfo remoteStackTraceString = typeof(Exception).GetField("_remoteStackTraceString", BindingFlags.Instance | BindingFlags.NonPublic);
    remoteStackTraceString.SetValue(exception, exception.StackTrace);
    throw exception;
}

This puts the original stack trace in the _remoteStackTraceString field of the exception, which gets concatenated to the newly reset stack trace when the exception is re-thrown.

This is really a horrible hack, but it does achieve what you want. You are tinkering inside the System.Exception class though so this method may therefore break in subsequent releases of the framework.