EF Core中AddOrUpdate方法

EF Core中取消了AddOrUpdate,然后就出现有了下面这段代码平替以下

                if (Account._context.Accounts.Any(acc => acc.puuid == resultAccount!.puuid))
                {
                    Account._context.Accounts.Update(resultAccount!);
                }
                else
                {
                    Account._context.Accounts.Add(resultAccount!);
                }