using System;

using System.Collections.Generic; 

​

//Customer class

public class Customer

{

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

      //(1) Name (public, string)

    public string Name { get; set; }

      //(2) Education (public, string)

    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 name, string education, string email)

            {

                  Name = name;

                  Education = education;

                  Email = email;

            }

​

      //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"

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

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

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

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

​

            //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("Name: " + c.Name.PadRight(15) + " Education: " + c.Education.PadRight(15) + " Email: " + 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("Email Length for " + c.Name + ": " + 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("Name: " + c.Name.PadRight(15) + " Education: " + c.Education.PadRight(15) + " Email: " + c.Email.PadRight(15));

                  }

            }

            //11. [Code] Clear List

            customerList.Clear();

      }

}