DataLayer.cs

using System;
using System.Collections.Generic;

namespace EmailSenderProgram
{
	class DataLayer
	{
		/// <summary>
		/// Mockup method for all customers
		/// </summary>
		public static List<Customer> ListCustomers()
		{
			return new List<Customer>()
		    {
					       new Customer(){Email = "jonnyfrez@hotmail.com", CreatedDateTime = DateTime.Now.AddHours(-7)}, 
					       new Customer(){Email = "mail2@mail.com", CreatedDateTime = DateTime.Now.AddHours(-1)},
                           new Customer(){Email = "mail3@mail.com", CreatedDateTime = DateTime.Now.AddMonths(-6)},
                           new Customer(){Email = "mail4@mail.com", CreatedDateTime = DateTime.Now.AddMonths(-1)},
                           new Customer(){Email = "mail5@mail.com", CreatedDateTime = DateTime.Now.AddMonths(-2)},
                           new Customer(){Email = "mail6@mail.com", CreatedDateTime = DateTime.Now.AddDays(-5)}
            };
		}

		/// <summary>
		/// Mockup method for listing all orders
		/// </summary>
		public static List<Order> ListOrders()
		{
			return new List<Order>()
			{
					       new Order(){CustomerEmail = "mail3@mail.com", OrderDatetime = DateTime.Now.AddMonths(-6)}, 
					       new Order(){CustomerEmail = "jonnyfrez@hotmail.com", OrderDatetime = DateTime.Now.AddMonths(-2)},  
                           new Order(){CustomerEmail = "mail6@mail.com", OrderDatetime = DateTime.Now.AddDays(-2)}
		    };
		}
	}
}