I have posted this issue earlier on
microsoft.public.dotnet.languages.csharp, but nobody replied to that.

Consider following code:

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private void button1_Click(object sender, EventArgs e) {
   using (System.Transactions.TransactionScope tx = new TransactionScope())
{
       System.Transactions.Transaction.Current.TransactionCompleted += new
TransactionCompletedEventHandler(Current_TransactionCompleted);

       System.Console.WriteLine(System.Threading.Thread.CurrentThread.GetHashCode());
// prints 4, could be different on your machine
       throw new Exception();

       tx.Commit();
   }
}

private void Current_TransactionCompleted(object sender,
TransactionEventArgs e) {
   System.Console.WriteLine(System.Threading.Thread.CurrentThread.GetHashCode());
//  prints 6, could be different on your machine
}

--------------------------------------------------------------------------------

The problem is the output, first it outputs 4, and it ouputs 6 (it can be a
different output on your machine).

I have various fields with [ThreadStatic] attribute.  Since the
TransactionCompleted is coming on a different thread, it is making all those
[ThreadStatic] fields useless.
This is driving me crazy.

The event MUST be fired on the same thread that created TransactionScope and
subscribed this event.
But the Microsoft implemented in a way, that the initial thread is stopped
and a different thread is used to fire the event (WHY???).  After the event
handler function finishes, application continues with the original thread.
WHY EVENT IS FIRED ON A DIFFERENT THREAD?  I have [ThreadStatic] members
which I cannot use.
I have cleanup routines which were tied to that specific transactions
created for that specific thread.

Since this is not explained in any documentation, I think it is a bug.

Thanks.

AM.