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using UserEMailNotificationSender.BL;
using UserEMailNotificationSender.Model;

namespace UserEMailNotificationSender
{
    class Program
    {
        static void Main(string[] args)
        {
            User aUser = new User("TheUser", "the_user@mail_service.com", false);

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using UserEMailNotificationSender.Infrastucture;
using UserEMailNotificationSender.Model;

namespace UserEMailNotificationSender.BL
{
    class SMTPNotificationSender
    {
        SMTPClient smtpClient = new SMTPClient();

        public void sendNotificationForUser(User userToNotify)

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using Core.Interfaces;
using Core.Model;

namespace Core.Services
{
    public class NotificationService
    {
        SendMail sendMail;

        public NotificationService(SendMail _sendMail)

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namespace Core.Interfaces
{
    public interface SendMail
    {
        void sendMail(string recipient, string subject, string message);
    }
}

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using Core.Model;
using Core.Services;
using Infrastucture.Services;
using System;

namespace UserEMailNotificationSender
{
    public class Program
    {
        static void Main(string[] args)

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[TestMethod]
public void isNonPremiumUserMailSentAndValid()
{
  var user            = new User("A", "A@B.com", false);
  var expectedSubject = "Notification";
  var expectedMessage = "Dear A this is a Notification!";

  var sendMail = Mock.Create<SendMail>();

  new NotificationService(sendMail).sendNotificationForUser(user);

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interface SensorDevice
{
  void powerOff();
  void enable();
  void disable();
  bool isEnabled();
  DateTime isEnabledSince();
  int getFirmwareVersion();
  long getSystemUptime();
  int getLastReading();

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namespace SensorDevices
{
    public interface SensorDevice : DeviceControl, DeviceState, SensorReading
    {}
    
    public interface DeviceControl
    {
        void powerOff();
        int getFirmwareVersion();
        long getSystemUptime();

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using SensorDevices;
using FakeSensors;
using System;

namespace Console_SensorDevice_Test
{
    static class Program
    {
        static void Main()
        {

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private async void DoWhoisLookup()
{
    EnableInput(false);

    try
    {
        var googleWhoisLookup = new WhoisLookup(tbHostToLookup.Text);

        // initiate HTTP request asynchronously
        Task<string> getWhoisInfoTask = googleWhoisLookup.GetWhoisInformationsAsync();