entity-framework – Entity Framework 4.1：在“Login”类型上

BusinessUser { Id(PK),Name,...}

Login { BusinessUserID(PK,FK),Email,Password,etc...}

BusinessUser和Login之间的关系是一对多/一.

我有以下配置
在BusinessUser EF配置类中

this.HasOptional(bu => bu.LoginInfo)
    .WithOptionalPrincipal(l => l.BusinessUser);

在登录EF配置类中

this.HasRequired(l => l.BusinessUser)
    .WithOptional(bu => bu.LoginInfo);

我得到以下异常

The navigation property ‘BusinessUser’ declared on type ‘Login’ has been configured
with conflicting multiplicities.

我首先在EF 4.1代码中使用我的一对一/零配置错误.

更新1：以下是我的班级结构

public class BusinessUser {
    public virtual int ID { get; set; }

    public virtual int BusinessID { get; set; }

    public virtual Business Business { get; set; }

    public Login LoginInfo { get; set; }
  }

 public class Login {
    public virtual int BusinessUserID { get; set; }

    public virtual string Email { get; set; }

    public virtual string Password { get; set; }

    public BUsinessUser BusinessUserInfo { get; set; }
  }

我也在寻找双向的.