entity framework - How to add a foreign key reference to ASP.Net MVC 5 Identity? -

i have new asp.net mvc 5.1 project using asp.net identity. seems reliable , promise, today spend 9 hours simple things if using sql.

my problem is, cannot create table via codefirst foreign key reference default aspnetusers table.

for example: have create table named - address

   public class address     {         [key]         public string userid { get; set; }         public string myaddress { get; set; }     } 

but how can create foreign key reference aspnetusers?

i try replace property above by

public identityuser myaddress { get; set; } // or public virtual identityuser myaddress { get; set; } // or public virtual applicationuser myaddress { get; set; } 

but of them still show error:

one or more validation errors detected during model generation:  miapos.models.identityuserlogin: : entitytype 'identityuserlogin' has no key defined. define key entitytype.  miapos.models.identityuserrole: : entitytype 'identityuserrole' has no key defined. define key entitytype.  identityuserlogins: entitytype: entityset 'identityuserlogins' based on type 'identityuserlogin' has no keys defined.  identityuserroles: entitytype: entityset 'identityuserroles' based on type 'identityuserrole' has no keys defined. 

i try override onmodelcreating post

protected override void onmodelcreating(dbmodelbuilder modelbuilder) {     modelbuilder.entity<identityuserlogin>().haskey<string>(l => l.userid);     modelbuilder.entity<identityrole>().haskey<string>(r => r.id);     modelbuilder.entity<identityuserrole>().haskey(r => new { r.roleid, r.userid }); } 

but when run add-migration, create identityuserlogin, identityrole, identityuserrole tables , duplicate, prefix different. (aspnet<->identity)

finally sql in 10 seconds, want know why cannot in codefirst? , why hard such things microsoft 2014 new technology.

you can this. because sometime may need 1-1 connection

 public class anothertable     {         [key]         public string userid { get; set; }          [foreignkey("userid")]         public virtual applicationuser user { get; set; }     }