FFFF/WpfApp1/Class1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Text;

namespace WpfApp1
{
    [Table("Roles")]
    public class Role
    {
        public int Id { get; set; }
        [Required]
        public string Name { get; set; }
        public List<Users> Users { get; set; }
    }
}