如何根据条件将多个模型组合成一个视图模型？ （WPF）

Question

我有以下三种模式：

namespace Company.Model {
    class Country
    {
        public int CountryId { get; set; }
        public string CountryName { get; set; }

    } }

和

namespace Company.Model
{
    class Employee
    {
        public int EmployeeId { get; set; }
        public string EmployeeFirstName { get; set; }
        public string EmployeeMiddleName { get; set; }
        public string EmployeeLastName { get; set; }
        public DateTime? EmployeeDOB { get; set; }
        public char? EmployeeGender { get; set; }
        public string EmployeeAddress { get; set; }
        public int? EmployeeContactNumber { get; set; }
        public string EmployeeEmailID { get; set; }
        public DateTime? EmployeeJoiningDate { get; set; }
        public DateTime? EmployeeConfirmationDate { get; set; }
        public DateTime? EmployeeExpectedInTime { get; set; }
        public DateTime? EmployeeExpectedOutTime { get; set; }
        public bool? EmployeeIsResigned { get; set; }
        public double? EmployeeSalary { get; set; }
        public string EmployeeDesignation { get; set; }
        public int? DepartmentId { get; set; }
        public int? CountryId { get; set; }
    }
}

和

namespace Company.Model
{
    class Department
    {
        public int DepartmentId { get; set; }
        public string DepartmentName { get; set; }

    }
}

现在我需要根据Employee.CountryId = Country.CountrId和Employee.DepartmentId = Department.DepartmentId的条件将所有三个组合成一个视图模型。

我基本上想要在表格上加入，以便获得每个员工的国家名称和部门名称。