C# 如何在触发器运行时运行更新查询？

我有两个客户机和用户。当在Clients表中更新EmailID时，EmailID应该在Users表中更新，为此我使用触发器。但我得到以下错误

对于INSERT、UPDATE、DELETE或MERGE语句的目标表，不允许使用NOLOCK和READUNCOMMITED lock提示

我的代码是

C:

触发：

CREATE TRIGGER UpdateEmailIDForClients
ON Clients
FOR UPDATE
as
begin
DECLARE @OldEmail varchar(50),@NewEmail varchar(50)
SELECT @NewEmail = EmailID FROM INSERTED
SELECT @OldEmail = EmailID FROM DELETED
UPDATE Users SET EmailID = @NewEmail 
    WHERE EmailID = @OldEmail
END

请帮帮我。谢谢..

您的用户表已被事务锁定

检查以下链接

警告：您的代码极易受到sql注入攻击！您的触发器无法处理多个插入！触发器不会每行调用一次-它每语句调用一次，插入和删除的触发器可以包含多行。您的代码当前只选择一个任意行，而忽略所有其他行。。。。

CREATE TRIGGER UpdateEmailIDForClients
ON Clients
FOR UPDATE
as
begin
DECLARE @OldEmail varchar(50),@NewEmail varchar(50)
SELECT @NewEmail = EmailID FROM INSERTED
SELECT @OldEmail = EmailID FROM DELETED
UPDATE Users SET EmailID = @NewEmail 
    WHERE EmailID = @OldEmail
END