using System;

using System.Collections.Generic;

using System.Linq;

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public class Program

{

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    private static List<WorkdayEmployee> _selectionPool = new List<WorkdayEmployee>();

​

    public static void Main()

    {

        var specialAssignmentEmployees = GetSpecialAssignmentEmployees();       // Get special assignment employees from method

        var workdayEmployees = GetWorkdayEmployees();                           // Get workday employees from method

        AddSpecialAssignmentsToSelectionPool(specialAssignmentEmployees);       // Call method to add employees to the selection pool

        foreach (var employee in _selectionPool)                                // Print out the selection pool contents

        {

            Console.WriteLine($"EmployeeId: {employee.EmployeeId}");

        }

    }

//================================================================================================================================================================

        public static void AddSpecialAssignmentsToSelectionPool(List<SpecialAssignment> specialAssignmentEmployees)

        {

            string groupCode = "N";                                                     // Define the group code to filter by

​

            _selectionPool.AddRange(specialAssignmentEmployees                          // Add employees to _selectionPool

                .Where(sa => sa.GroupCode == groupCode)                                 // Filter employees that match the defined GroupCode

                .Where(sa => !_selectionPool.Any(sp => sp.EmployeeId == sa.EmployeeId)) // Only add if the EmployeeId is not already in _selectionPool

                .Select(sa => new WorkdayEmployee                                       // Create a new WorkdayEmployee object

                {

                    EmployeeId = sa.EmployeeId,                                         // Add the EmployeeId from SpecialAssignment

                    JobCode = "",                                                       // Leave JobCode empty

                    DepartmentCode = ""                                                 // Leave DepartmentCode empty

                })

                .ToList());                                                             // Convert the filtered and mapped results to a list and add

        }

​

//================================================================================================================================================================  

​

    public static List<SpecialAssignment> GetSpecialAssignmentEmployees()        // Returns mocked special assignment employees

    {

        return new List<SpecialAssignment>

        {

            new SpecialAssignment { EmployeeId = "001", GroupCode = "O" },

            new SpecialAssignment { EmployeeId = "002", GroupCode = "N" },

            new SpecialAssignment { EmployeeId = "003", GroupCode = "O" },

        };

    }

​

    public static List<WorkdayEmployee> GetWorkdayEmployees()                    // Returns mocked workday employees

    {

        return new List<WorkdayEmployee>

        {

            new WorkdayEmployee { EmployeeId = "001", JobCode = "890567", DepartmentCode = "001" },

            new WorkdayEmployee { EmployeeId = "002", JobCode = "890345", DepartmentCode = "002" },

            new WorkdayEmployee { EmployeeId = "003", JobCode = "890678", DepartmentCode = "003" },

        };

    }

}

​

​

​

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public class SpecialAssignment

{

    public string EmployeeId { get; set; }

    public string GroupCode { get; set; }

}

​

​

​

​

public class WorkdayEmployee

{

    public string EmployeeId { get; set; }

    public string JobCode { get; set; }

    public string DepartmentCode {get; set;}

}

​

​