Please bare with me as I am a newbie trying to learn VS.

I have a text file that contains 10 integers in a list format
21
15
11
9
61
45
36
97
84
11

I wish to create an application that will:

A- Display the list
B- Allow editing of the list
C- write the edits to the file (display error message if not integer)
D- Display a message box that displays the sum of the integers is the list
E- Re-Total the integers in the list automatically as edited in the text file display.

I hope I described this accurately enough.
thanks and any help would be appreciated.