Autocomplete textbox From Database in windows forms

Question

Hi ,I've seen one of the articles here , named "Autosuggest TextBox From Database Column in Windows Forms" , and it was useful for me

 

but I want to create a TextBox that will suggest First names AND Last names from 2 SQL Server database columns FirstName  &  LastName.

 

I mean , if I typed A , it suggests me Anna, Amita ,.. (from first name column) and also Anderson , Armandi , ... (from the Family column)

thanks in advance

and I should say that I am a new member here :)