سلام دوستان...
من دو  تا موجودیت دارم که ما خوام برای اینا کلید اصلی و خارجی تعریف کنم .. اما نمی تونم و خطا می ده لطفا راهنمایی کننید(برنامه تو محیط کنسول هست)

 class Employee
    {
        [DatabaseGenerated(DatabaseGeneratedOption.None)]
        [Key]
        public int EmployeeID { get; set; }
        [Required]
        [StringLength(50)]
        public string  FirstName { get; set; }
        [Required]
        [StringLength(50)]
        public string  LastName { get; set; }
        [StringLength(50)]
        public string  MiddleName { get; set; }
        public virtual EmployeeDetail EmployeeDetail { get; set; }
    }




  class EmployeeDetail
    {
        [DatabaseGenerated(DatabaseGeneratedOption.None)]
        [Key, ForeignKey("Employee")]
        public int EmployeeID { get; set; }
        [StringLength(10)]
        public string  Gender { get; set; }
        [StringLength(255)]
        public string EmailAddress { get; set; }
        [StringLength(50)]
        public string  phoneNumber { get; set; }
        public virtual Employee Employee { get; set; }
    }


 class dbContext:DbContext

    {
        public dbContext() : base("defaultConnectionString")
        {

        }
        public DbSet<Employee> Employees { get; set; }
        public DbSet<EmployeeDetail> EmployeeDetails { get; set; }
    }

متن خطا:

Unable to determine the principal end of the 'efTest.EmployeeDetail_Employee' relationship. Multiple added entities may have the same primary key.