Final with comments

Lab3 Finished

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

namespace Lab3
{
    class Program
    {
        static void Main(string[] args)
        {
            //1.    Print out all people ordered by zip
            var data = new DataManager();
            Console.WriteLine("QUESTION 1");
            foreach (var s in data.AllPeople.OrderBy((person) => person.ZipCode))
            {
                Console.WriteLine(s.ToString());
            }
            Console.WriteLine();
            //2.    Print out all people ordered by last name, then by first name
            Console.WriteLine("QUESTION 2");
            foreach (var s in data.AllPeople.OrderBy((person) => person.LastName).ThenBy((person) => person.FirstName))
            {
                Console.WriteLine(s.ToString());
            }
            Console.WriteLine();
            //3.    Print out all people with zip codes greater than 50000, 
            //      ordered by their social security numbers
            Console.WriteLine("QUESTION 3");
            foreach (var s in data.AllPeople.Where(person => person.ZipCode > 50000).OrderBy(person => person.SocialSecurity))
            {
                Console.WriteLine(s.ToString());
            }
            Console.WriteLine();
            //4.    Get a reference to the person with an invalid zip code (greater than 99999), or none if no one exists. 
            Console.WriteLine("QUESTION 4");
            var myPerson = data.AllPeople.FirstOrDefault(person => person.ZipCode > 99999);
            Console.WriteLine(myPerson);
            Console.WriteLine();
            //5.    Print out all people with either the first or last name “Washington”
            Console.WriteLine("QUESTION 5");
            foreach (var s in data.AllPeople.Where((person) => person.LastName == "Washington" || person.FirstName == "Washington"))
            {
                Console.WriteLine(s.ToString());
            }
            Console.WriteLine();
            //6.    Print out all people who have the letter ‘i’ in both their first and last names.
            Console.WriteLine("QUESTION 6");
            foreach (var s in data.AllPeople.Where((person) => person.LastName.Contains("i") && person.FirstName.Contains("i")))
            {
                Console.WriteLine(s.ToString());
            }
            Console.WriteLine();
            //7.    Print out all people with social security numbers starting with 1,2,3,4, or 5 ordered by their 
            //      first name, followed by all people with social security numbers starting with 6,7,8.9, or 0 ordered 
            //      by their last name.  Use one foreach loop for this.
            Console.WriteLine("QUESTION 7");
            foreach (var s in data.AllPeople.
                              OrderBy(person => person.FirstName).
                              Where(person => int.Parse(person.SocialSecurity.ElementAt(0).ToString()) <= 5 && int.Parse(person.SocialSecurity.ElementAt(0).ToString()) > 0).
                              Union(data.AllPeople.
                              OrderBy(person => person.LastName).
                              Where(person => int.Parse(person.SocialSecurity.ElementAt(0).ToString()) > 5 || int.Parse(person.SocialSecurity.ElementAt(0).ToString()) == 0)))
            {
                Console.WriteLine(s.ToString());
            }
            Console.WriteLine();
            //8.    Print out the number of people who have the letter ‘a’ in their first name
            Console.WriteLine("QUESTION 8");
            Console.WriteLine(data.AllPeople.Count(person => person.FirstName.Contains("a")));
            Console.WriteLine();
            //9.    Print out all people with social security numbers beginning with 1, 3, or 5, 
            //      ordered by their first name.
            Console.WriteLine("QUESTION 9");
            foreach (var s in data.AllPeople.
                              OrderBy(person => person.FirstName).
                              Where(person => int.Parse(person.SocialSecurity.ElementAt(0).ToString())%2 == 1 && int.Parse(person.SocialSecurity.ElementAt(0).ToString()) <= 5))
            {
                Console.WriteLine(s.ToString());
            }
            Console.WriteLine();
            //10.   Print out all people with the number 3 in their zip code.
            Console.WriteLine("QUESTION 10");
            foreach (var s in data.AllPeople.Where(person => person.ZipCode.ToString().Contains("3")))
            {
                Console.WriteLine(s.ToString());
            }
            Console.WriteLine();
        }
    }
}