retrieving 1000+ users from AD group using C#

[drastogi]

I am trying to retrieve 5000 users from AD group, but when I set PageSize= 1000 (or let's say 15000) and SizeLimit=15000 , I still get only 1500 users. Any other configuration that I can set (I want to avoid range retrieval as suggested by MS) Please advice. Thanks Below is the code section: Please let me know what am I missing.

[drastogi]

try
{
searcher.SizeLimit=15000;
searcher.PageSize = 1000; 
return searcher.FindAll();
}

[Luk3r]

What is your full code? It appears you likely have a problem with the search string, assuming there really is 5000 users and not only 1500.

[drastogi]

private SearchResultCollection ExecuteBestEffortSearch(DirectorySearcher searcher)
    {
      if (searcher == null) { throw new ArgumentNullException("searcher"); }
      if (searcher.SearchRoot == null) { throw new ArgumentException("Directory Searcher does not have a search root.", "searcher"); }

      // Construct Search Message
      string message = String.Format("[{0}] ({1}) with filter [{2}] for attributes [{3}]",
        searcher.SearchRoot.Path, searcher.SearchScope, searcher.Filter, FlattenStringCollection(searcher.PropertiesToLoad));

      // Execute Search
      try
      {
        if (Logger.DebugLevel >= Logger.MaxDebugLevel)
        {
          Logger.Debug(0, "Executing directory search for " + message, null, DirectoryServiceException.ModuleName, Logger.MaxDebugLevel);
        }
                searcher.PageSize = 1000; //a positive number to turn off the default page limit in DirectorySearcher
        return searcher.FindAll();

       }
      catch (COMException adsiException)
      {
        DirectoryServiceException dsExeception = DirectoryServiceException.Create(
          String.Format("The directory search {0} was unable to execute due to a directory service error.", message), adsiException);

        if (dsExeception is DirectoryServerUnavailableException)
        {
          try
          {
            Guid searchRootGuid = searcher.SearchRoot.Guid;
            // Cleanup resources
            searcher.SearchRoot.Dispose();
            // Attempt to Re-Bind
            using (DirectoryEntry searchRootEntry = GetEntryByGuid(searchRootGuid))
            {
                            searcher.PageSize = 1000; //a positive number to turn off the default page limit in DirectorySearcher
              searcher.SearchRoot = searchRootEntry;
              return searcher.FindAll();
            }
          }
          catch (Exception ex)
          {
              Logger.LogError(30019, String.Format("The directory search {0} failed because the search root was unavailable and the server was not able to establish a new bind.", message), ex, DirectoryServiceException.ModuleName, Logger.MinDebugLevel);
          }
        }
        throw dsExeception;
      }
    }

[drastogi]

And SizeLimit i am defining when i create an object of DirectorySearch er class

[Luk3r]

I'm still not seeing in your code where you supply a search filter to only grab user objects.