Using "ContactsQuery" for searching particular contact in Google contact using Google API Ver 2

Question

Currently i am searching particular as below:

 Feed<Contact> f = contactsRequest.GetContacts();
    foreach (Contact e in f.Entries)
    {
     if (e.Title == "MyContact")
     {
    MesageBox.Show("Contact already exist");

     }
    }

This will work fine if no of contacts are less.But above code will become slow for large no of contacts.

I read about "ContactsQuery".How can i use it for above scenario ?

Answer 1

There is no support for full-text queries or locating a contact by email address

If you want to find a particular contact, you have to retrieve all contacts then search for the contact yourself, there's no other way at the moment.
ContactsQuery allow you to filter by:

NumberToRetrieve
StartIndex
StartDate
ShowDeleted
OrderBy
last-modifieddate
SortOrder
Group

and other parameters defined in:
Contact Data API reference
Google Data API refence
Google.GData.Contacts namespace