Hi,
You might want to add (objectClass=user) to the filter condition and try.
Eg:
mySearcher.Filter = "(&(objectClass=user)(anr=chen))";

Hello ,everyone:

   I want to search domain user in active directory  uses those code ,but
the result not return domain user information ,
but only return the  domain computer ,how can I resolve the  problem!

System.DirectoryServices.DirectoryEntry entry =
  new
System.DirectoryServices.DirectoryEntry("LDAP://silan.com/DC=silan,DC=com");
 System.DirectoryServices.DirectorySearcher mySearcher = new
  System.DirectoryServices.DirectorySearcher(entry);
 mySearcher.Filter = ("(anr=chen)");
 string s = "";
 foreach(System.DirectoryServices.SearchResult result in
  mySearcher.FindAll())
   {
   s = result.GetDirectoryEntry().Path;
     Console.WriteLine(s );
   }