C# outlook won't get list of contacts

[dcd]

Hi all I'm using trying to get my app to read in all contacts in the contact folder of Outlook. I'm using the Outlook Security manager to stop the pop up warnings. Outlook version is 2002(10.2627.26 25) I can create a contact in Outlook and I can use it to send an email. It's just the getting the contacts list that doesn't work. The thing is it also works on my dev machine but not on the users machine.

The code I'm using:
SecurityManager = new AddinExpress.Ou tlook.SecurityM anager();
try
{
Outlook._Applic ation outlookObj = new Outlook.Applica tion();
Outlook.MAPIFol der fldContacts =
(Outlook.MAPIFo lder)outlookObj .Session.GetDef aultFolder(Outl ook.OlDefaultFo lders.olFolderC ontacts);
Outlook.Items searchFolder = fldContacts.Ite ms;
Outlook.Contact Item contactItem = (Outlook.Contac tItem)searchFol der.GetFirst();

//Code to create a data table to put the contact info into.

SecurityManager .ConnectTo(outl ookObj);
SecurityManager .DisableOOMWarn ings = true;

while (contactItem != null)
{
dr = dt.NewRow();
dr[0] = contactItem.Fir stName;
dr[1] = contactItem.Las tName;
//etc etc etc
dt.Rows.Add(dr) ;
contactItem = (Outlook.Contac tItem)searchFol der.GetNext();
}

dv = new DataView(dt);
dv.Sort = "First Name ASC";
dgContacts.Data Source = dv;
}
catch (Exception ex)
{
Console.WriteLi ne(ex);
MessageBox.Show ("Contact List could not be retrieved from Outlook", "Contacts not retrieved",
MessageBoxButto ns.OK, MessageBoxIcon. Error);
this.Close();
}
finally
{
SecurityManager .DisableOOMWarn ings = false;
}


Can anyone see anything wrong here? I for the life of me can't figure out what is going on. I thought that the problem was with different versions of Outlook, but they are the same. Oh and I'm not using the enumeration for the Contacts Folder because Outlook 2002 doesn't support it. If I tried to use this code on Outlook 2003 would it work?

[dcd]

Hmmmm did a bit more digging it's failing on the cast:
contactItem = (Outlook.Contac tItem)searchFol der.GetNext();
in the while loop.

The error is:
System.InvalidC astException: Unable to cast COM object of type 'System.__ComOb ject' to interface type "Outlook.Contac tItem".

This is because he has a distribution list in his contacts folder and I have none. So I guess if anyone else is trying to do this same sort of operation watch out for distribution lists and ignore them if they come up.

Cheers