Customer Group Class

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace programName
{
    public class CustomerGroup
  {
        //Members
        private int groupID;
        private string customerName;
        private string address;
        private DateTime registerDate;
        private int totalTransactions;
        private Employee accountExecutive = new Employee();
        private List<CustomerGroup> customer = new List<CustomerGroup>();

        private List<CustomerGroup> customer;



    public CustomerGroup()
    {
       //Constructors
       groupID = 0;
       customerName = "";
       address = "";
       registerDate = DateTime.Now;
        totalTransactions = 200;
       accountExecutive = new Employee();
       List<Customer> unsortedCustomer = new List<Customer>();
    }


    public CustomerGroup (int newgroupID, string newCustomerName, string newAddress, DateTime newRegisterDate, int newTotalTransactions, Employee newaccountExecutive, List<Customer>newUnsortedCustomer)
        {
        groupID = newgroupID;
        customerName = newCustomerName;
        address = newAddress;
        registerDate = newRegisterDate;
        totalTransactions = newTotalTransactions;
        accountExecutive = newaccountExecutive;
        unsortedCustomer=newUnsortedCustomer;
        }

    public int groupID
        {
            get { return groupID; }
            set { groupID = value; }
        }

    public string customerName
        {
            get { return customerName; }
            set { customerName = value; }
        }

    public string address
        {
            get { return address; }
            set { address = value; }
        }

    public DateTime registerDate
        {
            get { return registerDate; }
            set { registerDate = value; }
        }

    public int totalTransactions
        {
            get { return totalTransactions; }
            set { totalTransactions = value; }
        }

    public Employee accountExecutive
        {
            get { return accountExecutive; }
            set { accountExecutive = value; }
        }

    public List<CustomerGroup> customer
        {
            get { return customer; }
            set { customer = value; }
        }

    //Work Methods

    //logic for determining discounts
    public int CalcRegisterDate()
        {
            //Get current date
            DateTime currDate = DateTime.Now;

            //Get difference in months
            int months = currDate.Month - addDate.Month;

            //Get average transactions per month
            int avgTransactions = 0;
            if (months > 0)                                    //If statement insures it doesn't divide by 0
                avgTransactions = totalTransactions / months;

            //Calculate discount
            int low = 6;
            int high = 15;
            int discount = 0;

            if (avgTransactions > low) //If has an average of 8 or more transactions per month, awarded 5% discount
                discount = 5;

            if (avgTransactions > high) //If has a an average of 15 or more transactions per month, awarded 10% discount
                discount = 10;

            return discount;


    public int GetRegisterDate()
        {
            // Get today's date
            DateTime currDate = DateTime.Now;

            // Get the difference in years
            int years = currDate.Year - startDate.Year;

            // Subtract another year if we're before the
            // start date in the current year
            if (currDate.Month < startDate.Month || (currDate.Month == startDate.Month && currDate.Day < startDate.Day))
                years--;

            return years;

  }



}