如何使模型生成具有级联更新的外键约束

Question

我使用的是asp.net wepAPi，我在employee和employeeLoan之间有一个外键列;

public class Employee
    {
        [Key,Required]
        [StringLength(50)]
        public String EmpID { get; set; }       
     }  




 public class EmployeeLoan
    {       [Required]
        [Display(Name="Employee")]
        public String EmpID { get; set; }
        [ForeignKey("EmpID")]
        public virtual Employee Employee { get; set; }  
    }

如何构建C＃模型，以便生成具有级联更新的外键约束

ALTER TABLE [dbo].[EmployeeLoans]  WITH CHECK ADD  CONSTRAINT [FK_dbo.EmployeeLoans_dbo.Employees_EmpID] FOREIGN KEY([EmpID])
REFERENCES [dbo].[Employees] ([EmpID])
ON UPDATE CASCADE -- I want this portion to be added but with this model it s not added
ON DELETE CASCADE
GO

ALTER TABLE [dbo].[EmployeeLoans] CHECK CONSTRAINT [FK_dbo.EmployeeLoans_dbo.Employees_EmpID]
GO

感谢先进!!