c# - ForeignKey using ASP.NET MVC 4 Migration Code first -

how create foreign key below user class on id of computer class?

user table:

[table("user")] class user{  [key]  public int iduser;  public int idcomputer; //foreignkey } 

computer table:

[table("computer")] class computer{  [key]  public int idcomputer; } 

how one-to-many relationship , one-to-one relationship between these classes, please?

to set user has many computers , computer has 1 user, this:

class user {     public int iduser {get;set;}      public virtual icollection<computer> computers {get;set;} }  class computer {     public int idcomputer {get;set;}      public int userid {get;set;} // automatically detected foreignkey since format [classname]id     public virtual user user {get;set;} } 

to set computer has many users , user has 1 computer, do:

class user {     public int iduser {get;set;}      public int computerid {get;set;}     public virtual computer computer {get;set;} }  class computer {     public int idcomputer {get;set;}      public virtual icollection<user> users {get;set;} } 

to set user has 1 computer:

class user {     public int id {get;set;}      public virtual computer computer {get;set;} }  class computer {     public int id {get;set;}      [required]     public int userid {get;set;}     public virtual user user {get;set;} } 

the [required] tag should eliminate errors one-to-one relationship

as side note, whole point of ef code first make things super simple , quick , easy, when don't use of features offers diminishes , have more manual work, can lead mistakes.

here's tutorial on how code-first. recommend read on it.

okay, re-read original question. can't have both (one-to-one , one-to-many) between same 2 classes, can either have one-to-one (i.e., user has 1 computer , computer has 1 user) or one-to-many (i.e, user has many computers , computer has 1 user, or computer has many users , user has 1 computer.) it's 1 or other, not both, kind of thing. fact think possible reinforces statement really need read tutorial or read on simple relational database structure