LDAP - User Info

   public UserInfo(string login)
        {
            LdapConnection con = new LdapConnection(new LdapDirectoryIdentifier("ldap.vsb.cz", 636));
            con.SessionOptions.SecureSocketLayer = true;
            con.AuthType = AuthType.Anonymous;
            using (con)
            {
                try
                {
                    SearchRequest request = new SearchRequest(
                    "",
                    String.Format("(&(objectClass=Person)(uid={0}))", login),
                    System.DirectoryServices.Protocols.SearchScope.Subtree
                    );
                    SearchResponse response = (SearchResponse)con.SendRequest(request);

                    if (response.Entries.Count == 0)
                    {
                        // NO
                    }
                    else
                    {
                        SearchResultEntry entry = response.Entries[0];
                        string dn = entry.DistinguishedName;
                        string path = "LDAP://ldap.vsb.cz:389/" + dn;
                        DirectoryEntry dentry = new DirectoryEntry(path);
                        dentry.AuthenticationType = AuthenticationTypes.Anonymous;

                        DirectorySearcher search = new DirectorySearcher(dentry);

                        SearchResult result = search.FindOne();
                        this.Login = result.Properties["cn"][0].ToString();
                        this.FName = result.Properties["givenname"][0].ToString();
                        this.LName = result.Properties["sn"][0].ToString();
                        this.Email = result.Properties["mail"][0].ToString();
                    }
                }
                catch
                {
                    this.Login = null;
                }
            }
        }