an exception has been raised that is likely due to a transient failure,consider enabling transient error resiliency by adding 'EnableRetryOnFailure()' to the 'UseSqlServer' call

异常：

 

 

 解决方法;

连接字符串上加入Packet Size=512 表示 用于与 SQL Server 实例通信的网络数据包的大小（以字节为单位）具体参考官网