错误消息：
The model backing the '***' context has changed since the database was created. Consider using Code First Migrations to update the database (https://go.microsoft.com/fwlink/?LinkId=238269).The model backing the '***' context has
阅读背景：
EF Code First（The model backing the '***' context has changed since the database was created.解决方法）(CSDN手动迁移)
来源：互联网
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