using System;

using System.Collections.Generic;

//using System.Collections.Generic; //1. [Code] Unmark this line of code

​

//Customer class

public class Customer

{

    //2. [Code] Use auto-implementation to add two properties

    //(1) Name (public, string)

    //(2) Education (public, string)

    public string Name {get; set;}

    public string Education {get; set;}

    //3. [Code] Use private field and public property to protect this variable

    //Email should contain "@"; if not, set default value as "N/A"

    //(3) Email (public, string)

    private string _Email;

    public string Email{

        get{

            return _Email;

        }

        set{

            if (value.Contains("@")){

                _Email = value;

            }

            else{

                _Email = "N/A";

            }

        }

    }

​

    //Default constructor

    public Customer()

    {}

​

    //4. [Code] Add the second constructor with 3 parameters to update 3 properties.

    public Customer(string n, string ed, string e){

        Name = n;

        Education = ed; 

        Email = e;

    }

    //5. [Code] Function

    //Function Name: EmailLength

    //Input: no

    //Output: int

    //return length of user's email

    public int EmailLength(){

        return Email.Length;

    }

}

public class Program

{

    //6. [Code] Add a CustomerList

    List<Customer> CustomerList = new List<Customer>();

    public void Main()

    {

        //7. [Code] Create 4 customer objects, and add them into a list

        //Name: "John", Education: "Bachelor", Email: "john@gmail.com"

        //Name: "David", Education: "Bachelor", Email: "david@iu.edu"

        //Name: "Anderson", Education: "Master", Email: "anderson@iu.edu"

        //Name: "Mary", Education: "Master", Email: "maryiu.edu"

        Customer John = new Customer ("John", "Bachelor", "john@gmail.com");

        CustomerList.Add(John);

        Customer David = new Customer ("David", "Bachelor", "david@iu.edu");

        CustomerList.Add(David);

        Customer Anderson = new Customer ("Anderson", "Master", "anderson@iu.edu");

        CustomerList.Add(Anderson);

        Customer Mary = new Customer ("Mary", "Master", "maryiu.edu");

        CustomerList.Add(Mary);

        //Show all list

        Console.WriteLine("Show All List");

        //8. [Code] Use foreach to loop the list and show name, education, and email information.

        //To make your information looks proper, use PadRight(15) to format your variable.

        foreach (Customer c in CustomerList){

            Console.WriteLine(c.Name.PadRight(15) + c.Education.PadRight(15) + c.Email.PadRight(15));

        }

        Console.WriteLine("=============================================");

        //Show all list

        Console.WriteLine("Show Email Length for all list");

        //9. [Code] Use foreach to loop the list and show the results of EmailLength() function

        foreach (Customer c in CustomerList){

            Console.WriteLine(c.EmailLength());

        }

        Console.WriteLine("=============================================");

​

        //Show Only Bachelor

        Console.WriteLine("Show Only Bachelor");

        //10. [Code] Use foreach to loop the list and show name, education, and email information.

        //To make your information looks proper, use PadRight(15) to format your variable.

        //Show ONLY Bachelor customer

        foreach (Customer c in CustomerList){

            if (c.Education == "Bachelor"){

                Console.WriteLine(c.Name.PadRight(15) + c.Education.PadRight(15) + c.Email.PadRight(15));

            }

        }

        //11. [Code] Clear List

        CustomerList.Clear();

    }

}