Import Active Directory

Hi,

I want to import all objects in the active directory but for some reason i am able to import only one domain objects.

I am using c# and LDAP and the code written by me is:

DirectoryEntry de = new DIrectoryEntry(LDAP://<domain name>)
DirectorySearcher dser = new DirectorySearcher(de);
dser.FindAll();

foreach(Search se in desr)
{
DirectoryEntry de = new DIrectoryEntry();
Console.WriteLine(de.Properties["sn"].Value.TOString());
}