using System;

using System.Collections.Generic;

using Microsoft.Exchange.WebServices.Data;

public class Program

{

    public static void Main()

    {

        // Create the recurrence example as described here: http://stackoverflow.com/questions/41225881/filter-appointments-by-firstoccurrence-lastoccurrence

        // Now we want to read a specific week, and we should/want to find the recurring master, because it has an occurrence on December 2.            

        var start = new DateTime(2016, 11, 28);

        var end = new DateTime(2016, 12, 4);

        string url = "https://outlook.office365.com/EWS/Exchange.asmx";  // Office365 EWS, change if you want to connect to a local instance

        var emailaddressToGetAppointmentsFrom = "[your emailaddress here]";

        var exchangeService = new Microsoft.Exchange.WebServices.Data.ExchangeService(ExchangeVersion.Exchange2010);

        exchangeService.Url = new Uri(url);

        exchangeService.Credentials = new WebCredentials("[your username]", "[your password]");

        GetFromExchange(exchangeService, emailaddressToGetAppointmentsFrom, start, end);

    }

    public static void GetFromExchange(ExchangeService exchangeService, string emailAddress, DateTime start, DateTime end)

    {

        DateTime startUtc = start.Date.ToUniversalTime(); // start from the beginning, and make it UTC

        DateTime endUtc = end.Date.AddDays(1).ToUniversalTime(); // search till the end, and make it UTC

        var PidLidClipStart = new ExtendedPropertyDefinition(DefaultExtendedPropertySet.Appointment, 0x8235, MapiPropertyType.SystemTime); // https://msdn.microsoft.com/en-us/library/office/cc839770.aspx

        var PidLidClipEnd = new ExtendedPropertyDefinition(DefaultExtendedPropertySet.Appointment, 0x8236, MapiPropertyType.SystemTime); // https://msdn.microsoft.com/en-us/library/office/cc765713.aspx

        var filters = new List<SearchFilter>();

        filters.Add(new SearchFilter.IsGreaterThanOrEqualTo(PidLidClipStart, startUtc));

        filters.Add(new SearchFilter.IsLessThanOrEqualTo(PidLidClipEnd, endUtc));

        var filterfull = new SearchFilter.SearchFilterCollection(LogicalOperator.And, filters);

        // get the calendar folder

        var calendarFolder = new FolderId(WellKnownFolderName.Calendar, new Mailbox(emailAddress));

        // create an EWS itemview & and search via FindItems

        var view = new ItemView(1000);

        view.PropertySet = new PropertySet(BasePropertySet.FirstClassProperties, AppointmentSchema.Subject);

        var findResults = exchangeService.FindItems(calendarFolder, filterfull, view);

        if (findResults.TotalCount > 0)

        {

            foreach (var item in findResults)

            {

                var appointment = (Appointment)item;

                Console.WriteLine(string.Format("Found appointment {0}, with id: {1}", appointment.Id.UniqueId, appointment.Subject));

            }

        }

    }

}