how to segregate brands in asp.net c#

hi, i am developing one site for tools which has several brand.

so i want to categories the brand in
first div should contain :   0-9, A-B, C-D , E-F .....y-z.
in below should show.
                                                0-9
                                               here, 0-9 brands,
                                               A-B
                                            here, A-B's brands,
          ...