Effective pagination with Active Directory searches

Question

What would be an effective way to do pagination with Active Directory searches in .NET? There are many ways to search in AD but so far I couldn\'t find how to do it effectively.

Answer 1

    private static DirectoryEntry forestlocal = new DirectoryEntry(LocalGCUri, LocalGCUsername, LocalGCPassword);
    private DirectorySearcher localSearcher = new DirectorySearcher(forestlocal);

     public List GetAllUsers() 
    {
        List users = new List();

        localSearcher.SizeLimit = 10000;
        localSearcher.PageSize = 250;

        string localFilter = string.Format(@"(&(objectClass=user)(objectCategory=person)(!(objectClass=contact))(msRTCSIP-PrimaryUserAddress=*))");

        localSearcher.Filter = localFilter;

        SearchResultCollection localForestResult;

        try
        {
            localForestResult = localSearcher.FindAll();

            if (resourceForestResult != null) 
            {

                foreach (SearchResult result in localForestResult) 
                {
                    if (result.Properties.Contains("mail"))
                        users.Add((string)result.Properties["mail"][0]);
                }

            }

        }
        catch (Exception ex) 
        {

        }

        return users;
    }