Need Suggestion on my problem

Question

I Want to prepare simple Windows Application who is able to create letters based on list of student data provided.

List  contains
        1.Name of student
        2.Roll number
        3.Class
        3.Mailing Address

Options are open for list of names.
        1.Providing excel sheet
        2.Providing grid on the Form where use will enter/copy data
        3.Let me Any other option if available.

Scenario :
        1.User will provide list
        2.user Will hit create letters button.
        3.Letters for all the students should be created in MS-word format.

I want to prepare this application in C#.Net

Give me suggestions/ approach on this