EF Create Employee Table with Hash Set - Reports To

Hi:

I would like to create the following table from Entity Framework:

CREATE TABLE [dbo].[Employees] (
    [EmployeeID]      INT            IDENTITY (1, 1) NOT NULL,
    [LastName]        NVARCHAR (20)  NOT NULL,
    [FirstName]       NVARCHAR (10)  NOT NULL,
    [ReportsTo]       INT            NULL,
    CONSTRAINT [PK_Employees] PRIMARY KEY CLUSTERED ([EmployeeID] ASC),
    CONSTRAINT [FK_Employees_Employees] FOREIGN KEY ([ReportsTo]) REFERENCES [dbo].[Employees] ([EmployeeID])

);

GO
CREATE NONCLUSTERED INDEX [LastName]
    ON [dbo].[Employees]([LastName] ASC);

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This is what I have so far - but it is creating an extra field:

public class Employee
    {
        public Employee()
        {
            Employees1 = new HashSet<Employee>();
        }

        public int EmployeeID { get; set; }

        [Required]
        [StringLength(20)]
        public string LastName { get; set; }

        [Required]
        [StringLength(10)]
        public string FirstName { get; set; }


        public int? ReportsTo { get; set; }

        public virtual ICollection<Employee> Employees1 { get; set; }

        public virtual Employee Employee1 { get; set; }

    }

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Any help fixing this greatly appreciated.

RBS