get calendar by uid (c#)

  static void Main(string[] args) 
 { 
     ServicePointManager.ServerCertificateValidationCallback = (sender, certificate, chain, errors) => true; 
   
     const string id = "040000008200E00074C5B7101A82E008000000007069352667BBC9010000000000000000100000000C74ABD802575A41BC09B0E12352657B"; 
   
     string bufferString = GetObjectIdStringFromUid(id); 
   
     var service = new ExchangeServiceBinding 
         { 
           Url = "https //w2k3x64/ews/exchange.asmx",
           Credentials = new NetworkCredential("bob", "Password!", "contoso"), 
           RequestServerVersionValue = new RequestServerVersion { Version = ExchangeVersionType.Exchange2007_SP1} 
         }; 
   
     var response = service.FindItem(new FindItemType 
         {
             ParentFolderIds = new[] { new DistinguishedFolderIdType { Id = DistinguishedFolderIdNameType.calendar } },
             ItemShape = new ItemResponseShapeType
                 {
                     BaseShape = DefaultShapeNamesType.AllProperties,
                 },
             Restriction = new RestrictionType {
                 Item = new IsEqualToType
                     {
                       Item = new PathToExtendedFieldType
                         {
                            DistinguishedPropertySetId = DistinguishedPropertySetType.Meeting,
                            DistinguishedPropertySetIdSpecified = true,
                            PropertyId = 0x03,
                            PropertyIdSpecified = true,
                            PropertyType = MapiPropertyTypeType.Binary
                         },
                       FieldURIOrConstant = new FieldURIOrConstantType
                         {
                           Item = new ConstantValueType
                           {
                               Value = bufferString
                           }
                         }
                     }
                 }
         });
     var messageType = ((FindItemResponseMessageType) response.ResponseMessages.Items[0]);
     Console.Out.WriteLine("messageType.ResponseClass = {0}", messageType.ResponseClass);
 
     if (messageType.ResponseClass != ResponseClassType.Success)
     {
         Console.Out.WriteLine(messageType.MessageText);
         return;
     }
     var returnedItems = messageType.RootFolder.Item as ArrayOfRealItemsType;
 
     if (returnedItems == null || returnedItems.Items == null)
     {
         Console.Out.WriteLine("Nothing found.");
         return;
     }
 
     foreach (CalendarItemType item in returnedItems.Items)
     {
         Console.Out.WriteLine("item.Subject = {0}", item.Subject);
         Console.Out.WriteLine("item.UID = {0}", item.UID);
     }
     Console.ReadLine();
 }
 

 private static string GetObjectIdStringFromUid(string id)
 {
     var buffer = new byte[id.Length/2];
     for (int i = 0; i < id.Length/2; i++)
     {
         var hexValue = byte.Parse(id.Substring(i*2, 2), NumberStyles.AllowHexSpecifier);
         buffer[i] = hexValue;
     }
     return Convert.ToBase64String(buffer);
 }