public static void Transaction() { myitEntities entity = null; DbTransaction tran = null; try { entity = new myitEntities(); entity.Connection.Open(); tran = entity.Connection.BeginTransaction(); Student st = entity.Student.FirstOrDefault(c => c.StudentID == 20); st.StudentName = "test"; st.Age = 55; entity.SaveChanges(); // 提交事务 tran.Commit(); } catch (Exception ex) { if (tran != null) { // 事务回滚 tran.Rollback(); Console.WriteLine("事务回滚"); throw ex; } } finally { if (entity != null && entity.Connection.State != ConnectionState.Closed) { entity.Connection.Close(); } } }