T-SQL事务和SqlTransaction之间的提交行为不一致。

在使用SqlTransaction时，需要注意其与T-SQL事务的不同之处。在SqlTransaction中，需要手动将事务提交或回滚。如果在代码中使用了T-SQL事务（如BEGIN TRANSACTION和COMMIT TRANSACTION），则调用SqlTransaction.Commit()方法时可能会导致提交的行为不一致。

以下是一段示例代码，其中使用了T-SQL事务和SqlTransaction，但没有正确地处理它们之间的不一致性：

SqlConnection connection = new SqlConnection("connectionString");
connection.Open();

// begin T-SQL transaction
SqlCommand cmd1 = connection.CreateCommand();
cmd1.CommandText = "BEGIN TRANSACTION";
cmd1.ExecuteNonQuery();

// begin SqlTransaction
SqlTransaction transaction = connection.BeginTransaction(IsolationLevel.ReadUncommitted);
SqlCommand cmd2 = connection.CreateCommand();
cmd2.Transaction = transaction;

// execute some commands
// ...

// commit T-SQL transaction
SqlCommand cmd3 = connection.CreateCommand();
cmd3.CommandText = "COMMIT TRANSACTION";
cmd3.ExecuteNonQuery();

// commit SqlTransaction
transaction.Commit();

这段代码会导致提交的行为不一致。正确的处理方式是在SqlTransaction的回调函数中执行T-SQL事务的提交或回滚。以下是修改后的代码：

SqlConnection connection = new SqlConnection("connectionString");
connection.Open();

// begin SqlTransaction
SqlTransaction transaction = connection.BeginTransaction(IsolationLevel.ReadUncommitted);

try
{
    // execute some commands using SqlTransaction
    // ...

    // commit SqlTransaction
    transaction.Commit();
}
catch (Exception)
{
    // rollback SqlTransaction
    transaction.Rollback();
    throw;
}

// begin T-SQL transaction
SqlCommand cmd1 = connection.CreateCommand();
cmd1.CommandText = "BEGIN TRANSACTION";
cmd1.Transaction = transaction;
cmd1.ExecuteNonQuery();

try
{
    // execute some commands using T-SQL transaction
    // ...

    // commit T-SQL transaction
    SqlCommand cmd2 = connection.CreateCommand();
    cmd2.CommandText = "COMMIT TRANSACTION";
    cmd2.Transaction = transaction;
    cmd2.ExecuteNonQuery();
}
catch (Exception)
{
    // rollback T-SQL transaction
    SqlCommand cmd3 = connection.CreateCommand();