using System;
using System.DirectoryServices;
using ActiveDs;
class MainClass
{
[STAThread]
static void Main(string[] args)
{
string Path = "LDAP://dsaddom.nttest.microsoft.com:636/CN=Welby,OU=gregmcb,DC=dsaddom,DC=nttest,DC=microsoft,DC=com";
string User = "user\\pass";
string Password = "pass";
DirectoryEntry Entry = new DirectoryEntry(Path, User, Password);
Entry.Close();
}
}