EF Code First (the model backing the ' * * * ' context has changed since, the database was created. Workaround) (CSDN Manual migration)

Error message:

The model backing the ' * * * ' context has changed since, the database was created. Consider using Code first migrations to update the database (http://go.microsoft.com/fwlink/?LinkId=238269).

Cause of Error:

(1) The data model has changed, and the problem is caused by not updating to the database.

In fact, the situation I encountered is not the cause (1), but (2) caused by

(2) Update to the EF 6.1.0 for the database, and the data Access layer is EF 6.0.2

Workaround:

(1) To update the database with code first, the command is as follows:

Add-migration
Update-database-verbose

(2) Change the data access layer to EF 6.1.0, solve the problem

EF Code First (the model backing the ' * * * ' context has changed since, the database was created. Workaround) (CSDN Manual migration)