c#事務用法

ado.net2.0的SqlTransaction使用方法
/////ado.net1.0中使用Transacation（事務)
string connectionString = "database=Northwind;pwd=admin;uid=sa;server=DATABASE-VPC\\SQL2005";
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                conn.Open();
                SqlTransaction transaction = conn.BeginTransaction();
                try
                {
                    using (SqlCommand cmd = new SqlCommand())
                    {
                        cmd.Connection = conn;
                        cmd.CommandType = CommandType.Text;
                        cmd.CommandText = "";
                        cmd.Transaction = transaction;
                        cmd.ExecuteNonQuery();
                        transaction.Commit();//提交事務
                    }
                }
                catch
                {
                    transaction.Rollback();//事務回滾
                }
/////2.0中使用事務
 string connectionString = "database=Northwind;pwd=admin;uid=sa;server=DATABASE-VPC\\SQL2005";
            string connectionStringTwo = "database=Test;pwd=admin;uid=sa;server=DATABASE-VPC\\SQL2005";
            using (TransactionScope transaction = new TransactionScope())//使用事務
            {
                try
                {
                    using (SqlConnection conn = new SqlConnection(connectionString))
                    {
                        using (SqlCommand cmd = new SqlCommand())
                        {
                            cmd.CommandText = "insert into [member] (name) values ('test')";
                            cmd.CommandType = CommandType.Text;
                            cmd.Connection = conn;
                            conn.Open();
                            cmd.ExecuteNonQuery();
                        }
                    }
                    using (SqlConnection conn = new SqlConnection(connectionStringTwo))
                    {
                        using (SqlCommand cmd = new SqlCommand())
                        {
                            cmd.CommandText = "insert into [member] (name) values ('test')";
                            cmd.CommandType = CommandType.Text;
                            cmd.Connection = conn;
                            conn.Open();
                            cmd.ExecuteNonQuery();
                        }
                    }
                    transaction.Complete();//就這句就能夠了。
                }
                catch (Exception ex) { MessageBox.Show(ex.Message); }
            }
/*ado.net1.0與ado.net2.0中對比
1.0中不能跨數據庫，速度慢
2.0中能夠跨數據庫，2.0中再也不使用com+，速度比1.0快50%（由於它不用把大量的時間消耗在查找在com+中)
2.0中的事務會自動判斷使用何種事務（不用您考慮是簡單事務仍是分部式事務）。
2.0中的Transactions新添加了命名空間。沒有com+註冊和com+的開銷。
*/