/// <summary>
/// This is main function for this class
/// It will create Exchange service object as output
/// </summary>
/// <param name="context"></param>
protected override void Execute(CodeActivityContext context)
{
// getting the input values ************************
string userEmailaddress = UserEmail.Get(context);
string userEmailPassword = new System.Net.NetworkCredential(string.Empty, UserPassword.Get(context)).Password;
string url = Url.Get(context);
ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2013);
service.Credentials = new System.Net.NetworkCredential(userEmailaddress, userEmailPassword, "");
service.Url = new Uri(url);
ObjExchangeService.Set(context, service);
}