Exchange Server uses

Hi,

Actually i want import outlook calender to my asp.net web application(CRM).

I don't have any idea how it is implemented. But someone tell me about exchange server.Can we do this using asp.net integration with exchange server like EWS.

class Program
    {
        static void Main(string[] args)
        {
            ExchangeHelper exchangeHelper = new ExchangeHelper();
            exchangeHelper.RetrieveAppointments("test.user100@emailHostDOTcom", DateTime.Now, DateTime.Now.AddHours(2));


        }
    }
    public class ExchangeHelper
    {
        ExchangeService exchangeService;

        public ExchangeHelper()
        {
            //Instantiate a new ExchangeService object
            exchangeService = new ExchangeService(ExchangeVersion.Exchange2010_SP1);

            //Set the exchange WebService URL
            exchangeService.Url = new Uri("https://mail.bhspecialty.com/EWS/exchange.asmx");

            //Set the credentials of the service to the credentials
            //that are associated with the impersonating account.
            exchangeService.Credentials = new WebCredentials("bhsi/apache",
                                            "Berksi2013",
                                            "mail.bhspecialty.com"
                                                );

        }


        public void RetrieveAppointments(string mailBox, DateTime startDate, DateTime endDate)
        {
            //Set the ImpersonatedUserId property of the ExchangeService object to identify the impersonated user (target account).
            //This example uses the user's SMTP email address.
            exchangeService.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, mailBox);

            //bind to the calendar folder of mailBox and load all its first class properties
            CalendarFolder folder = CalendarFolder.Bind(exchangeService, WellKnownFolderName.Calendar);

            //Represents a date range view of appointments in calendar folder search operations
            //If the CalendarView element is specified the Web service returns a list of single calendar items
            //and occurrences of recurring calendar items within the range specified by StartDate and EndDate
            CalendarView view = new CalendarView(startDate, endDate);

            //search for appointments matching range specified in calendar view
            FindItemsResults<Appointment> results = folder.FindAppointments(view);

            //print results
            foreach (Appointment appointment in results)
            {
                //find appointments will only give basic properties.
                //in order to get more properties (such as BODY), we need to call call EWS again
                Appointment appointmentDetailed = Appointment.Bind(exchangeService, appointment.Id, new PropertySet(BasePropertySet.FirstClassProperties) { RequestedBodyType = BodyType.Text });
                Console.WriteLine("Appointment ID:  " + appointment.Id);
                Console.WriteLine("Subject:         " + appointment.Subject);
                Console.WriteLine("Start Time:      " + appointment.Start.ToString("M/d/yyyy h:mm tt") + appointment.TimeZone);
                Console.WriteLine("End Time:        " + appointment.End.ToString("M/d/yyyy h:mm tt") + appointment.TimeZone);
                if (!string.IsNullOrEmpty(appointmentDetailed.Body.Text))
                    Console.WriteLine("Body             " + appointmentDetailed.Body.Text.Trim());
                Console.WriteLine("Required Attendees");
                foreach (Attendee attendee in appointmentDetailed.RequiredAttendees)
                {
                    Console.WriteLine("             " + attendee.Address);
                }
                Console.WriteLine("Optional Attendees");
                foreach (Attendee attendee in appointmentDetailed.OptionalAttendees)
                {
                    Console.WriteLine("             " + attendee.Address);
                }
                Console.WriteLine();
            }

            //Set it back to null so that any actions that will be taken using the exchange service
            //applies to impersonating account (i.e.account used in network credentials)
            exchangeService.ImpersonatedUserId = null;
        }



    }