Edit a Business Contact

  private void EditBusinessContact()
{ 
Outlook.ApplicationClass _app = new Outlook.ApplicationClass();
Outlook.Application olApp = (Outlook.Application)_app;
Outlook.NameSpace olNameSpace = _app.GetNamespace("MAPI");
Outlook.Folders folders = olNameSpace.Session.Folders;
Outlook.Folder bcmRootFolder = (Outlook.Folder)folders["Business Contact Manager"];
Outlook.Folder contactsFolder = (Outlook.Folder)bcmRootFolder.Folders["Business Contacts"];
string strQuery = "[FileAs] = 'John Smith'";
Outlook.ContactItem contactItem = (Outlook.ContactItem)contactsFolder.Items.Find(strQuery);
if (contactItem != null)
{
contactItem.BusinessAddressCity = "New City Address";
contactItem.BusinessAddressState = "New Address State";
contactItem.BusinessAddressStreet = "New Address Street";
contactItem.Save();
}
else
{
Console.WriteLine("Contact not found");
}
}

  Sub EditBusinessContact() 
Dim olApp As Outlook.Application
Dim objNS As Outlook.NameSpace
Dim bcmRootFolder As Outlook.Folder
Dim olFolders As Outlook.Folders
Dim bcmContactsFldr As Outlook.Folder
Dim existContact As Outlook.ContactItem
Set olApp = CreateObject("Outlook.Application")
Set objNS = olApp.GetNamespace("MAPI")
Set olFolders = objNS.Session.Folders
Set bcmRootFolder = olFolders("Business Contact Manager")
Set bcmContactsFldr = bcmRootFolder.Folders("Business Contacts")
Set existContact = bcmContactsFldr.Items.Find("[FileAs] = 'John Smith'")
If Not TypeName(existContact) = "Nothing" Then
  existContact.BusinessTelephoneNumber = "(111)111-1111"
  existContact.Email1Address = "someone@example.com"
  existContact.Save 

Else
  MsgBox ("Could not find the Business Contact with Full Name John Smith") 

End If
Set existContact = Nothing
Set bcmContactsFldr = Nothing
Set bcmRootFolder = Nothing
Set olFolders = Nothing
Set objNS = Nothing
Set olApp = Nothing
End Sub