EV: Exception when Using EF “Code First” with an Existing Database

Exception when Using EF “Code First” with an Existing Database

 

The error message

"The model backing the 'AddressBook' context has changed since the database was created. Either manually delete/update the database, or call Database.SetInitializer with an IDatabaseInitializer instance. For example, the RecreateDatabaseIfModelChanges strategy will automatically delete and recreate the database, and optionally seed it with new data."

Official Solution

Database.SetInitializer(null);

Source: http://stackoverflow.com/questions/3600175/the-model-backing-the-database-context-has-changed-since-the-database-was-crea

 

Better Solution

If you find there is a table named like __MigrationHistory under Tables\System Tables in SQL Server Management Studio, just deleted it. Then, the exception will go away.