using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace DepartmentStaffDatabase { public class Department { public int Id { get; set; } public string DepartmentName { get; set; } public string Head { get; set; } } public class Position { public int Id { get; set; } public string PositionName { get; set; } public double Salary { get; set; } public int DepartmentId { get; set; } } public class Employee { public int Id { get; set; } public string EmployeeName { get; set; } public DateTime Birthdate { get; set; } public string Address { get; set; } public string PhoneNumber { get; set; } public string Email { get; set; } public int PositionId { get; set; } } public class Contract { public int Id { get; set; } public DateTime DateOfConclusion { get; set; } public int Duration { get; set; } public int EmployeeId { get; set; } } public class Course { public int Id { get; set; } public DateTime DateOfEvent { get; set; } public int HoursNumber { get; set; } public string Result { get; set; } } public class Employee_Course { public int EmployeeId { get; set; } public int CourseId { get; set; } } }