EWS Mail Notifier

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace EWSConsoleNotify
{
    class PushNotification
    {
        private Notify _parent;
        
        public PushNotification(Notify Parent)
        {
            _parent = Parent;
        }

        public SendNotificationResultType ProcessNotification(SendNotificationResponseType SendNotification)
        {          
            SendNotificationResultType result = new SendNotificationResultType(); // Notification's result
            bool unsubscribe = false; 

            ResponseMessageType[] responseMessages = SendNotification.ResponseMessages.Items; // Response messages

            foreach (ResponseMessageType responseMessage in responseMessages)
            {
                if (responseMessage.ResponseCode != ResponseCodeType.NoError)
                {                    
                    result.SubscriptionStatus = SubscriptionStatusType.Unsubscribe;
                    return result;
                }

                NotificationType notification = ((SendNotificationResponseMessageType)responseMessage).Notification;

                string subscriptionId = notification.SubscriptionId;
              
                // If subscription Id is not the current subscription Id, unsubscribe
                if (subscriptionId != _parent.SubscriptionId)
                {
                    unsubscribe = true;
                }
                else
                {
                    for (int c = 0; c < notification.Items.Length; c++)
                    {
                        // Get only new mail events
                        if (notification.ItemsElementName[c].ToString() == "NewMailEvent")
                        {
                            BaseObjectChangedEventType bocet = (BaseObjectChangedEventType)notification.Items[c];

                            _parent.ShowMessage(((ItemIdType)bocet.Item).Id);
                        }
                    }
                }           
            }

            if (unsubscribe)
            {
                result.SubscriptionStatus = SubscriptionStatusType.Unsubscribe;
            }
            else
            {
                result.SubscriptionStatus = SubscriptionStatusType.OK;
            }


            return result;
        }
    }
}