using System;

using System.Collections.Generic;

using System.Collections;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

    }

}

​

public class Order

{

    public int Id { get; set; }

    public DateTime OrderDate { get; set; }

    public decimal TotalAmount { get; set; }

    public string CustomerName { get; set; } = string.Empty;

}

​

​

public class Test

{

    List<Order> orders = new List<Order>();

    public Test()

    {

        var random = new Random();

        var orders = Enumerable.Range(1, 100).Select(i => new Order

        {

            Id = i,

            OrderDate = DateTime.Now.AddDays(-random.Next(1, 365)),

            TotalAmount = Math.Round((decimal)(random.NextDouble() * 500 + 20), 2),

            CustomerName = $"Customer {i}"

        }).ToList();

    }

    /******  QUESTION 1  ******/

    public decimal TotalAmountForMonth(string yymm)

    {

        //Implement This Method

        //Return Total Amount for the Month being passed

        throw new Exception("");

    }

    /******** QUESTION 2 ******/

    public ****changeThis*** ValidateAndParseDateTime(string input)

    {

        //Implement This Method

        // " 06/20/2023 " => DateTime 06/20/2023

        // "" => null

        // " Test " => Throw and Exception

        // "06/20/2023" => DateTime 06/20/2023

        throw new Exception("");

    }

}