using System;
using System.DirectoryServices;
public class AddProperty
{
public static void Main()
{
DirectoryEntry de = new DirectoryEntry(
"LDAP://192.168.1.100/cn=kblum, ou=sales, dc=ispnet1, dc=net",
"cn=Administrator, dc=ispnet1, dc=net","password",
AuthenticationTypes.ServerBind);
de.Properties["telephoneNumber"].Add("(111)222-3333");
de.Properties["telephoneNumber"].Add("(444)555-6666");
de.CommitChanges();
de.Close();
}
}