System.DirectoryServices is slow?

Question

I\'m using the code below to look up information in active directory when a user logs on to a website. Running against a local domain it\'s very quick, but running over a VP

Answer 1

Another suggestion is to use System.DirectoryServices.Protocols directly; you code will look like:

string filter = "(&(&(objectclass=user)(objectcategory=person))" + 
                "sAMAccountName=username)";
NetworkCredential credentials = new NetworkCredential(...);
LdapDirectoryIdentifier directoryIdentifier = 
   new LdapDirectoryIdentifier("server", 389, false, false);
using (LdapConnection connection = 
   new LdapConnection(directoryIdentifier, credentials, AuthType.Basic))
{
    connection.Timeout = new TimeSpan(0, 0, 30);
    connection.SessionOptions.ProtocolVersion = 3;
    SearchRequest search = 
        new SearchRequest(query, filter, SearchScope.Base, "mail");
    SearchResponse response = connection.SendRequest(search) as SearchResponse;
    foreach(SearchResultEntry entry in response.Entries)
    {
        Console.WriteLine(entry.Attributes["mail"][0]);
    }
}