资源管理器的自定义交易范围

Question

我试图在内存中创建事务，并在tutorial之后创建了一个示例资源管理器：

public class VolatileRM : IEnlistmentNotification
{
   private int memberValue = 0;
   private int oldMemberValue = 0;

   public int MemberValue
   {
      get { return memberValue; }
   }

   public void SetMemberValue(int newMemberValue)
   {
      Transaction currentTx = Transaction.Current;
      if (currentTx != null)
      {
         Console.WriteLine("VolatileRM: SetMemberValue -
                            EnlistVolatile");
         currentTx.EnlistVolatile(this, EnlistmentOptions.None);
      }
      oldMemberValue = memberValue;
      memberValue = newMemberValue;
   }

   public void Commit(Enlistment enlistment)
   {
      Console.WriteLine("VolatileRM: Commit");
      oldMemberValue = 0;
   }

   public void InDoubt(Enlistment enlistment)
   {
   }

   public void Prepare(PreparingEnlistment preparingEnlistment)
   {
      preparingEnlistment.Prepared();
   }

   public void Rollback(Enlistment enlistment)
   {
      Console.WriteLine("VolatileRM: Rollback");
      // Restore previous state
      memberValue = oldMemberValue;
      oldMemberValue = 0;
   }
}

我可以通过执行以下操作来创建交易范围，

using (TransactionScope txSc = new TransactionScope())
{
   vrm = new VolatileRM();
   vrm.SetMemberValue(3);
   txSc.Complete();
}

但是，我希望事务范围仅适用于我的InMemory事务，而不适用于其中的其他任何对象，例如EntityFramework或sql。

如何将TransactionScope的范围限制为仅应用于自定义对象？