DirectoryEntry group = new DirectoryEntry("LDAP://CN=Sales,DC=Fabrikam,DC=COM");
object members = group.Invoke("Members",null);
foreach( object member in (IEnumerable) members)
{
DirectoryEntry x = new DirectoryEntry(member);
Console.WriteLine(x.Name);
}
DirectoryEntry entry = new DirectoryEntry("LDAP://BLACK.COM/CN=SSS,OU=Test,DC=Black,DC=Com")
System.DirectoryServices.PropertyCollection pro;
pro = entry.Properties;
foreach(object member in pro["memberOf"])
{
string memberName = member.ToString();
}