code first - MS Entity Framework 4.1 - Maintain data across restructuring -

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i using code first approach manage ef. examples have seen don't seem allow use ef able make changes db schema , preserve data.

so have entity/object of:

public class person    int id;    string nickname;

and add age so:

public class person    int id;    string nickname;     int age;

how can preserve data may in database "person"?

dont call system.data.entity.database.setinitializer().

or call system.data.entity.database.setinitializer() createdatabaseifnotexists().

calling dropcreatedatabasealways or dropcreatedatabaseifmodelchanges drop db.


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