public ActiveDirectory(string container, string name, string userid, string password)
{
_Container = container;
_GlobalContainer = GetGlobalContainer(container);
_Name = name;
_userid = userid;
_password = password;
_Context = new PrincipalContext(ContextType.Domain, Name, Container, userid, password);
_GlobalContext = new PrincipalContext(ContextType.Domain, Name, _GlobalContainer, userid, password);
}