C# - TimeSheet Application

Lab1.Driver

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//http://collabedit.com/pg9sd
namespace Lab1
{
    class Driver
    {
        /// <summary>
        /// allUsers sets up the list of Users that will contain         Work Weeks (hours worked, date information, etc.)
        /// </summary>
        static List<Users> allUsers = new List<Users>();

        /// <summary>
        /// Opening menu screen, allows the user to make a selection (add user, add hours, exit etc.)
        /// The try catch takes in the user's selections, makes an int coversions, and if the conversion is viable, no exception is thrown
        /// Switch statement goes through each option and calls appropriate methods
        /// </summary>
        /// <param name="args"></param>
        static void Main(string[] args)
        {
            int userSelection = 99;
            Console.WriteLine("Time Card Pro");
            while (userSelection != 0)
            {
                Console.WriteLine("1. Add new user");
                if (allUsers.Count > 0)
                {
                    Console.WriteLine("2. Select user to add hours");                   
                    Console.WriteLine("3. Select user to edit hours");
                }
                Console.WriteLine("0. Exit the application");
                Console.WriteLine("Please make a selection");
                try
                {
                    userSelection = Convert.ToInt32(Console.ReadLine());
                }
                catch (FormatException e)
                {
                    Console.WriteLine("Please input a number");
                    userSelection = 99;
                }
                switch (userSelection)
                {
                    case 1:
                        CreateUser();
                        break;
                    case 2:
                        SelectUsers(true);
                        break;
                    case 3:
                        SelectUsers(false);
                        break;
                    case 0: //do nothing
                        break;
                    default: Console.WriteLine("Input not recognized. Try again.");
                        break;
                }
            }

        }

        /// <summary>
        /// When you are in the add or edit function, you get a list of users(employees) that have
        /// been entered into the system. They will be labled 1. 2. 3. etc. Based on the number you enter
        /// it will go to that particular user, and you can add/change hours accordingly 
        /// </summary>
        /// <param name="option">true is add hours, false is edit</param>
        private static void SelectUsers(bool option)
        {
            for (int i = 0; i < allUsers.Count; i++)
            {
                int selectionNum = i + 1;
                Console.WriteLine(selectionNum + ". : " + allUsers[i].FirstName + " " + allUsers[i].LastName);
            }
            Console.WriteLine("Select user via number.");
            int userSelection = 0;
            try
            {
                userSelection = Convert.ToInt32(Console.ReadLine());
            while (userSelection < 1 || userSelection > allUsers.Count)
            {
                Console.WriteLine("Input incorrect. Please select a user by number");
                userSelection = Convert.ToInt32(Console.ReadLine());
            }
            if (option)
            {
                InputHours(allUsers[userSelection - 1]);
            }
            else
            {
                EditHours(allUsers[userSelection - 1]);
            }
            }
            catch (FormatException e)
            {
                SelectUsers(option);
            }
        }

        /// <summary>
        /// Allows the user to select an emlpoyee and edit the hours they have previously entered
        /// </summary>
        private static void EditHours(Users currentUser)
        {
            if (currentUser.WorkList.Count == 0)
            {
                Console.WriteLine("Work hours empty. Entering add hours mode.");
                InputHours(currentUser);
            }
            else
            {
                Console.WriteLine("Select week to change.");
                for (int i = 0; i < currentUser.WorkList.Count; i++)
                {
                    int selectionNum = i + 1;
                    Console.WriteLine(selectionNum + ".: " + currentUser.WorkList[i].WorkedHours.Date);
                }
                try
                {
                    int selection = Convert.ToInt32(Console.ReadLine()) - 1;
                    Console.WriteLine("Input new hours: ");
                    int changedHours = Convert.ToInt32(Console.ReadLine());

                    currentUser.WorkList[selection].Hours = changedHours;
                    Console.WriteLine("Hours changed to: " + changedHours);
                }
                catch (FormatException e)
                {
                    Console.WriteLine("Input incorrect.");
                    EditHours(currentUser);
                }
            }
        }


        /// <summary>
        /// InputHours() is called after an Employee has been added to the time sheet application. You are able to select a user from a 
        /// provided list, enter in the day, month, and year, and then you enter in the hours worked on that day. 
        /// </summary>
        /// <param name="currentUser">Stores  and keeps track of the current user to input hours for.</param>       
        private static void InputHours(Users currentUser)
        {
            //boolean to check if any of the dates are wrong
            bool isIncorrect = true;
            while (isIncorrect)
            {
                isIncorrect = false;
                //Has the most issues with exception
                Console.WriteLine("Enter the first day of the week (day, month, year) e.g. 24, 02, 2013");
                string userInput = Console.ReadLine();
                string[] splitDate = userInput.Split(',');
                int[] dateArray = new int[3];
                for (int i = 0; i < splitDate.Length; i++)
                {
                    try
                    {
                        dateArray[i] = Convert.ToInt32(splitDate[i]);
                    }
                    catch(FormatException e)
                    {
                        break;
                    }
                }
                if (dateArray[0] < 1 || dateArray[0] > 31)
                {
                    isIncorrect = true;
                    Console.WriteLine("Day format incorrect.");
                }
                if (dateArray[1] < 1 || dateArray[1] > 12)
                {
                    isIncorrect = true;
                    Console.WriteLine("Month format incorrect");
                }
                if (dateArray[2] < 1 || dateArray[2] > DateTime.Now.Year + 2)
                {
                    isIncorrect = true;
                    Console.WriteLine("Year format incorrect");
                }
                if (!isIncorrect)
                {
                    DateTime weekBegin = new DateTime(dateArray[2], dateArray[1], dateArray[0], 0, 0, 0);

                    //boolean to check if any are equal to the what has already been recorded
                    bool isDuplicate = false;
                    for (int i = 0; i < currentUser.WorkList.Count; i++)
                    {
                        if (currentUser.WorkList[i].WorkedHours == weekBegin)
                        {
                            isDuplicate = true;
                            Console.WriteLine("This week has already been entered. Entering edit mode.");
                            EditHours(currentUser);
                        }
                    }
                    if (!isDuplicate)
                    {
                        Console.WriteLine("Enter amount of hours worked: ");
                        int hoursWorked = -1;
                        while (hoursWorked == -1)
                        {
                            try
                            {
                                hoursWorked = Convert.ToInt32(Console.ReadLine());
                            }
                            catch (FormatException e)
                            {
                                Console.WriteLine("Numbers only please.");
                                hoursWorked = -1;
                            }
                            if (hoursWorked > 168 || hoursWorked < 0)
                            {
                                Console.WriteLine("Hours outside of workable range. Try again.");
                                hoursWorked = -1;
                            }
                        }
                        WorkWeek inputWeek = new WorkWeek(weekBegin, hoursWorked);
                        currentUser.WorkList.Add(inputWeek);
                        Console.WriteLine(hoursWorked + " added to " + weekBegin.Day + "/" + weekBegin.Month + "/" + weekBegin.Year);
                    }
                }
            }
        }

        /// <summary>
        /// Create's a new user from the information input in the console and add's it to the allUsers list.
        /// </summary>
        private static void CreateUser()
        {
            Console.WriteLine("Please input user's First Name");
            string fName = Console.ReadLine();
            Console.WriteLine("Please input user's Last Name");
            string lName = Console.ReadLine();
            Console.WriteLine("Please input user's title");
            string title = Console.ReadLine();

            Users addedUser = new Users(fName, lName, title);
            allUsers.Add(addedUser);
            Console.WriteLine("User: " + fName + " " + lName + " added.");
        }
    }
}