Entity Framework 4.1-code first specifies the foreign key name

In Entity Framework 4.1, foreign keys are generated in the following ways:

1-if the navigation attribute is specified, a foreign key is automatically generated. The naming rule is "Table name_primary key name"
2-by default, fields with the same primary key name as the navigation property are automatically marked as foreign keys,
3-use [foreignkey] to mark the attribute of the specified object class as a foreign key,
4-upgrade Mode 2. fields with the same primary key name as the navigation attribute are automatically marked as foreign keys, and then the column names in the database corresponding to the field are specified.

Method 3 and 4 specify the names of columns in the generated database.

View code

     Public   Class  User {  Public   Int Userid { Get ; Set  ;}  Public   String Name { Get ; Set  ;}  Public   String Email { Get ; Set  ;}}  Public   Class  Userextinfo {  Public   Int Userextinfoid { Get ; Set ;}  //  1-generate a foreign key: user_userid          Public   Virtual User user { Get ; Set  ;}  //  2-generate a foreign key: userid          Public   Int Userid { Get ; Set  ;} Public   Virtual User user { Get ; Set  ;}  //  3-generate a foreign key: f_userid          Public   Int F_userid { Get ; Set  ;} [Foreignkey (  "  F_userid  " )]  Public   Virtual User user { Get ; Set  ;}  //  4-generate a foreign key: f_userid [Column ( "  F_userid  "  )]  Public   Int Userid { Get ;Set  ;}  Public   Virtual User user { Get ; Set  ;}}