all users from active diractory

try
{
   string path = "LDAP://usihgdgfui";
   string filter = "(&(objectCategory=person))";
   string[] propertiesToLoad = new string[1] { "name" };

   using (DirectoryEntry root = new DirectoryEntry(path, "xx\\xxxx", "xxxx"))
   using (DirectorySearcher searcher = new DirectorySearcher(root, filter, propertiesToLoad))
   using (SearchResultCollection results = searcher.FindAll())
   {
      foreach (SearchResult result in results)
      {
         string name = (string)result.Properties["name"][0];
                        
         comboBox1.Items.Add(name);
      }
   }
}
catch
{
}