System.Transactions.VolatileEnlistmentPreparing.ChangeStatePreparing C# (CSharp) Method

        internal override void ChangeStatePreparing(InternalEnlistment enlistment)
        {
            // If the transaction promotes during phase 0 then the transition to
            // the promoted phase 0 state for the transaction may cause this
            // notification to be delivered again.  So in this case it should be
            // ignored.
        }