我想： using (Entities e = new Entities())
{
EntityKey key = new EntityKey("Entities.Users", "UserId", 20);
User user = new User { EntityKey = key};
Role role = e.Roles.FirstOrDefault();
我有以下型號： class Person < ActiveRecord::Base
has_many :accounts, :through => :account_holders
has_many :account_holders
end
class AccountHolder < ActiveRecord::Base
belongs_to :account
比方說，我們有兩個表有許多一對多的關係： public class Left{ /**/ }
public class Right{ /**/ }
public class LeftRight{ /**/ }
如下足以解開這些記錄（忽略多個關係的可能性或沒有明確的關係）？ public void Unhook(Left left, Right right){
var rela