Transaction 確認。

ちょっと話題に出た＋忘れかけてたので再確認してみた。

参考
トランザクション スコープを使用した暗黙的なトランザクションの実装
とか。

static void Main( string[] args ) {
  TranTest test = new TranTest();
  test.TestExecute();
  Console.WriteLine( "---------------------------------" );
  test.TestExecute2();
}

class TranTest {
  public void TestExecute() {
    try {
      Console.WriteLine( Transaction.Current == null ? "null" : "not null" );

      using (TransactionScope scope1 = new TransactionScope()) {
        Transaction ct = Transaction.Current;
        Transaction.Current.TransactionCompleted += CurrentTransactionCompleted;
        Console.WriteLine( "scope1 DistributedIdentifier " );
        Console.WriteLine( "  {0} {1:HH:mm:ss.fff} {2}"
          , Transaction.Current.TransactionInformation.LocalIdentifier
          , Transaction.Current.TransactionInformation.CreationTime.ToLocalTime()
          , ct.Equals( Transaction.Current )
        );
        Thread.Sleep( 100 );

        using (TransactionScope scope2
          = new TransactionScope( TransactionScopeOption.Required )
        ) {
          Console.WriteLine( "scope2 DistributedIdentifier " );
          Console.WriteLine( "  {0} {1:HH:mm:ss.fff} {2}"
            , Transaction.Current.TransactionInformation.LocalIdentifier
            , Transaction.Current.TransactionInformation.CreationTime.ToLocalTime()
            , ct.Equals( Transaction.Current )
          );
          scope2.Complete();
          Console.WriteLine( "scope2.Complete" );
        }

        using (TransactionScope scope3
          = new TransactionScope( TransactionScopeOption.RequiresNew )
        ) {
          Console.WriteLine( "scope3 DistributedIdentifier " );
          Console.WriteLine( "  {0} {1:HH:mm:ss.fff} {2}"
            , Transaction.Current.TransactionInformation.LocalIdentifier
            , Transaction.Current.TransactionInformation.CreationTime.ToLocalTime()
            , ct.Equals( Transaction.Current )
          );
          Transaction.Current.TransactionCompleted += CtTransactionCompleted;
          scope3.Complete();
        }

        using (TransactionScope scope4
          = new TransactionScope( TransactionScopeOption.Suppress )
        ) {
          Console.WriteLine( Transaction.Current == null );
        }

        scope1.Complete();
        Console.WriteLine( "scope1.Complete" );
      }
    } catch (TransactionAbortedException) {
      Console.WriteLine( "Catch TransactionAbortedException" );
    }
  }

  public void TestExecute2() {
    using (TransactionScope scope1 = new TransactionScope()) {
      using (TransactionScope scope3
        = new TransactionScope( TransactionScopeOption.RequiresNew )
      ) {
        Console.WriteLine( "scope3 DistributedIdentifier " );
        Console.WriteLine( "  {0} {1:HH:mm:ss.fff} {2}"
          , Transaction.Current.TransactionInformation.LocalIdentifier
          , Transaction.Current.TransactionInformation.CreationTime.ToLocalTime()
          , Transaction.Current.Equals( Transaction.Current )
        );
        Transaction.Current.TransactionCompleted += CtTransactionCompleted;
        //scope3.Complete();
      }
      scope1.Complete();
    }
  }
}

結果。

null
scope1 DistributedIdentifier
  65c3ecbc-644a-48e8-80e6-956bdb9ea815:1 16:24:23.272 True
scope2 DistributedIdentifier
  65c3ecbc-644a-48e8-80e6-956bdb9ea815:1 16:24:23.272 True
scope2.Complete
scope3 DistributedIdentifier
  65c3ecbc-644a-48e8-80e6-956bdb9ea815:2 16:24:23.272 False
CtTransactionCompleted Committed
True
scope1.Complete
CurrentTransactionCompleted Committed
---------------------------------
scope3 DistributedIdentifier
  65c3ecbc-644a-48e8-80e6-956bdb9ea815:4 16:24:23.272 True
CtTransactionCompleted Aborted

Transaction.Current.TransactionInformation.CreationTime がなんで全部一緒なのかはよくわかんなかった。