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EWS Performance in C# WinForms application

I'm using EWS in my winforms application to create a new appointment in my Outlook (+ to get items from my Outlook Calendar).
The issue i'm having is the following:
Everything works perfect but currently it takes 20-25 seconds to retrieve my appointments (= calendar items in Outlook) and 13-20 seconds to create an appointment
The code that does this comes straight from 'Google':
private void btn_Test_Click(object sender, EventArgs e)
{
DateTime d1 = DateTime.Now;
ServicePointManager.ServerCertificateValidationCallback = CertificateValidationCallBack;
try
{
service = new ExchangeService(ExchangeVersion.Exchange2013);
service.Credentials = new WebCredentials("mail", "pass");
/*service.TraceEnabled = true;
service.TraceFlags = TraceFlags.All;*/
service.AutodiscoverUrl("mail", RedirectionUrlValidationCallback);
service.Url = new Uri("https://mail.domain.com/EWS/Exchange.asmx");
}
catch (Exception ml2)
{
MessageBox.Show(ml2.ToString());
}
// We get 10 items in the calendar for the next week
DateTime startDate = DateTime.Now;
DateTime endDate = startDate.AddDays(7);
const int NUM_APPTS = 10;
// Initialize the calendar folder object with only the folder ID.
CalendarFolder calendar = CalendarFolder.Bind(service, WellKnownFolderName.Calendar, new PropertySet());
// Set the start and end time and number of appointments to retrieve.
CalendarView cView = new CalendarView(startDate, endDate, NUM_APPTS);
// Limit the properties returned to the appointment's subject, start time, and end time.
cView.PropertySet = new PropertySet(AppointmentSchema.Subject, AppointmentSchema.Start, AppointmentSchema.End);
// Retrieve a collection of appointments by using the calendar view.
FindItemsResults<Appointment> appointments = calendar.FindAppointments(cView);
Console.WriteLine("\nThe first " + NUM_APPTS + " appointments on your calendar from " + startDate.Date.ToShortDateString() +
" to " + endDate.Date.ToShortDateString() + " are: \n");
foreach (Appointment a in appointments)
{
Console.Write("Subject: " + a.Subject.ToString() + " ");
Console.Write("Start: " + a.Start.ToString() + " ");
Console.Write("End: " + a.End.ToString());
Console.WriteLine();
}
DateTime d2 = DateTime.Now;
MessageBox.Show( "Seconds: " + (d2 - d1).TotalSeconds.ToString());
}
Since I have absolutely 0 experience with EWS (or developing while using API's) I was wondering if there was room for performance or I wanted to know if this is just normal? I haven't found anything EWS = SLOW related so I was worrying a bit.
Could it be that my code is wrong or that i need to configure one thing or another server sided to improve results?
Thanks

The most likely thing to slow down you code is
service.AutodiscoverUrl("mail", RedirectionUrlValidationCallback);
service.Url = new Uri("https://mail.domain.com/EWS/Exchange.asmx");
You do an AutoDiscover and then set the link manually which is make the first AutoDiscover Call redundant. Auto-discover will do multiple searches of Local AD domain, DNS records to try and discover the correct URL to use so I would suggest if you are going to hardcode the URL you remark out the first line.
Also your testing logic only looks at the total time to execute you function which isn't going to be helpfully you should look at the time to complete each operation eg
FindItemsResults<Appointment> appointments = calendar.FindAppointments(cView);
or
CalendarFolder calendar = CalendarFolder.Bind(service, WellKnownFolderName.Calendar, new PropertySet());
or any Save, Send type method call when the actually call to the server is made if you time this that will give you a true indication of the speed of each call.

Exchange EWS, Calendar FindItems vs FindAppointments?

I followed this guide to retrieve Meetings in Exchange made via Outlook; https://msdn.microsoft.com/en-us/library/office/dn495614(v=exchg.150).aspx
Everything runs fine, no exceptions but it doesn't return any results. I then tried FindItems instead of FindAppointments and this does return my results. Why does FindAppointments not return the meetings?
I'm creating test appointments in Outlook online. By clicking Menu > Calendar > New, I complete the details of the event and then add attendees before saving. These are returned by FindItems() but there doesn't seem to be a property to retrieve Location and Attendee list? Where FindAppointments would give me the properties I need if the data was returned. I have had Outlook installed on a computer previously where creating a meeting specifically mentions the word 'Meeting' where this appears to be calendar items. I'm not sure what the difference is?
My end goal is when users schedule meetings via Outlook and I'll have an application that retrieves details of those meetings inc. an attendee list and location.
Many thanks for any pointers!

We need to add list of required items to property set, in the given example the property set is restricted.
In property code
// Limit the properties returned to the appointment's subject, start time, and end time.
cView.PropertySet = new PropertySet(AppointmentSchema.Subject, AppointmentSchema.Start, AppointmentSchema.End);
instead of above use below property set,
cView.PropertySet = new PropertySet(AppointmentSchema.Subject, AppointmentSchema.Start, AppointmentSchema.End, AppointmentSchema.Location, AppointmentSchema.RequiredAttendees);
or the best for initial learning is
// Limit the properties returned to the appointment's subject, start time, and end time.
cView.PropertySet = new PropertySet(BasePropertySet.FirstClassProperties);

Manged to find a solution taken from this thread
The code could do with a tidy up but it correctly pulls down the appointments and allows me to get the data that I need.
FindItemsResults<Item> result = service.FindItems(WellKnownFolderName.Calendar, new CalendarView(DateTime.Now, DateTime.Now.AddDays(7)));
foreach(Item item in result.Items)
{
ServiceResponseCollection<GetItemResponse> itemResponseCollection = service.BindToItems(new[] { new ItemId(item.Id.UniqueId) }, new PropertySet(BasePropertySet.FirstClassProperties));
foreach(GetItemResponse itemResponse in itemResponseCollection)
{
Appointment appointment = (Appointment)itemResponse.Item;
Console.WriteLine("Subject: " + appointment.Subject);
Console.WriteLine("Location: " + appointment.Location);
Console.WriteLine("AppointmentType: " + appointment.AppointmentType.ToString());
Console.WriteLine("Body: " + appointment.Body);
Console.WriteLine("End: " + appointment.End.ToString());
Console.WriteLine("UniqueId: " + appointment.Id.UniqueId);
Console.WriteLine("Start: " + appointment.Start.ToString());
Console.WriteLine("When: " + appointment.When);
Console.WriteLine("Required Attendees: ");
foreach (var attendee in appointment.RequiredAttendees)
{
Console.WriteLine(attendee.Name);
}
}

how to cancel last subscription in paypal using asp.net

Hi i am using recurring paypal subscription button that works perfectly.But i want to know the way to cancel last subscription of same user.
Explanation:
I have 1 user,3 users and 6 users plans.
I did the subscription part for all types now what i want:
lets say user change from one user to three users
and go to payment screen to upgrade
Will the last subscription will end automatically or not.
i found this code for cancel subscription:
<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_subscr-find&alias=SGGGX43FAKKXN">
this is the code i use for subscription button that works perfectly:
protected void btnsubscribe_Click(object sender, EventArgs e)
{
decimal amt = 0;
if (ddlPlanType.SelectedValue.ToString() != "6")
{
amt = Convert.ToDecimal(ddlPlanType.SelectedValue);
}
else
{
int userNo = 0;
if (txtusers.Text.Trim() != "")
userNo = Convert.ToInt32(txtusers.Text);
amt = Convert.ToDecimal(ddlPlanType.Items[2].Value) + Convert.ToDecimal(10.95 * userNo);
}
int qty = Convert.ToInt32(rdoplantype.SelectedValue);
StringBuilder sb = new StringBuilder();
sb.Append("business=" + ConfigurationManager.AppSettings["paypalemail"].ToString());
sb.Append("&return=" + ConfigurationManager.AppSettings["SuccessURL"].ToString());
sb.Append("&cancel_return=" + Server.UrlEncode(ConfigurationManager.AppSettings["FailedURL"].ToString()));
sb.Append("&button_subtype=services&upload=1&no_note=1&rm=2");
sb.Append("&currency_code=USD&cmd=_xclick-subscriptions&src=1&modify=0&item_number=Standard&p3=1");
if (qty == 1)
{
Server.UrlEncode(sb.AppendFormat("&t3={0}", "M").ToString());
Server.UrlEncode(sb.AppendFormat("&a3={0}", amt).ToString());
}
else if (qty == 12)
{
Server.UrlEncode(sb.AppendFormat("&t3={0}", "Y").ToString());
Server.UrlEncode(sb.AppendFormat("&a3={0}", amt*12).ToString());
}
Server.UrlEncode(sb.AppendFormat("&item_name={0}", ddlPlanType.SelectedItem.Text + " " + txtusers.Text).ToString());
Response.Redirect(ConfigurationManager.AppSettings["PayPalUrl"].ToString() + sb.ToString());
Response.Redirect("Success.aspx");
}
Does this code works for cancel last subscription?
<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_subscr-find&alias=SGGGX43FAKKXN">
Thanks

The code does not actually cancel the subscription. This example was taken from the docuentation:
<IMG BORDER="0"SRC="https://www.paypalobjects.com/en_US/i/btn/btn_unsubscribe_LG.gif">
It displays an "Unsubscribe" button image to the user that links to the subscription cancellation function on the PayPal website. the user must log into their PayPal account to continue. the email address or payer ID here:
cmd=_subscr-find&alias=alice%40mystore%2ecom
is identifying you as the subscription provider to be cancelled. they will have to click another "Unsubscribe" button here to complete the process.

<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_subscr-find&alias=SGGGX43FAKKXN">
<img src="https://www.paypalobjects.com/en_US/i/btn/btn_unsubscribe_LG.gif" BORDER="0">
</a>
This HTML makes it very easy for us to create an Unsubscribe button and place it wherever we want. Before we can use this, though, we need to make one change to the href attribute. At the end of the URL for the href, you’ll see alias=SGGGX43FAKKXN. This alias parameter is defined by PayPal as “the secure merchant account ID of the subscription provider’s PayPal account. This value is in the My business info section of your PayPal account profile.” Replace the value SGGGX43FAKKXN with your own ID.

Manage booking policy of resources in Exchange 2013 via Managed Api

I want to manage the booking policy of a room, maximum duration of a meeting for example. Do someone has idea how do you do that via Managed API?

The managed API cannot police max duration but what you need todo is validate the entry before you submit a reservation...
public override bool IsNoOverTimeLimit(Reservation reservation)
{
return reservation.End.Subtract(reservation.Start).TotalMinutes <= 120;
}
if(!IsNoOverTimeLimit)
{
var errorMsg = new Label();
var fontSize = FontUnit.Point(10);
errorMsg.Font.Size = fontSize;
errorMsg.Text = "Reservation time is limited to " + ((float)30 / 60).ToString(CultureInfo.InvariantCulture) + " hours at a time.<br /> ";
placeHolder.Controls.Add(errorMsg);
}
My version is way more complicated than this but you get the point. Just simply check the reservation before you submit and if over time limit, return to page with some pretty warning..

How to add recurring entry Google Calendar

I would like to add a recurring event with C#. I found on the Web that the following should work. When I run the method to insert the entry, It fails on the
EventEntry insertedEntry = service.Insert(calendarUri, entry); statement !
I get this error :
"Execution of request failed:
https://www.google.com/calendar/feeds/user#gmail.com/private/full?gsessionid=6eGsOTuhQ-YUVWp2BV_25g"
When I remove the recurrence code, everything works fine ! I noticed that this piece of code is pretty old ! How can I simply add a recurring event on Google Calendar with the .NET library ?
EventEntry entry = new EventEntry();
entry.Title.Text = "Hello World !";
// Recurring event:
String recurData =
"RRULE:FREQ=WEEKLY;WKST=SU;UNTIL=20131010;BYDAY=SU\r\n";
Recurrence recurrence = new Recurrence();
recurrence.Value = recurData;
entry.Recurrence = recurrence;
string htmlDescription = "Woww, really ?";
if (htmlDescription != null && htmlDescription.Length > 0)
{
entry.Content.Type = "html";
entry.Content.Content = htmlDescription;
}
Where eventLocation = new Where();
eventLocation.ValueString = "Somewhere";
entry.Locations.Add(eventLocation);
DateTime start = DateTime.Now;
When eventTime = new When();
eventTime.StartTime = start;
DateTime endTime = DateTime.Now.AddHours(2);
eventTime.EndTime = endTime;
entry.Times.Add(eventTime);
eventTime.AllDay = true;
EventEntry insertedEntry = service.Insert(calendarUri, entry);

Straight from Google (click the .NET example if it doens't come up as a default):Create Recurring Events
Hopefully this will give you some ideas if not out-right answer your question.
Cheers.

Your recurrence string telling it when to end requires a full time entry. You simply said UNTIL=20131010. The question is 20131010 where? We can assume you want midnight, but then... midnight where?
String recurData =
"RRULE:FREQ=WEEKLY;WKST=SU;UNTIL=20131010T000000-05:00;BYDAY=SU\r\n";
The above change should make your event recur until Midnight US Eastern time on 2013-10-10.