通过单独表实现层级关联在EF中如何用Fluent API描述?

    

public class Employee

    {

        public int id { get; set; }

        public String guid { get; set; }

        public String name { get; set; }

        public DateTime dt_hired { get; set; }



        public virtual Employee Leader { get; set; }

        public virtual ICollection<Employee> Staff { get; set; }

    }

CREATE TABLE `e2e` (

	`id` INT(11) NOT NULL AUTO_INCREMENT,

	`e0` VARCHAR(50) NOT NULL COMMENT '上级guid',

	`e1` VARCHAR(50) NOT NULL COMMENT '下级guid',

	`dt_assigned` DATETIME NOT NULL,

	PRIMARY KEY (`id`)

)