how to create forum in asp.net?

[eeccll]

does anyone know how to create forum in asp.net?
how many tables we need to create?
is it one table for POSTING the first thread, and another table for REPLYING the thread?
if i implement the forum using 2 tables (one for POST and one for REPLY), can i combine 2 tables when displaying the data to datagrid?

[eeccll]

i've created the forum..using 2 tables.. but how to combine 2 tables in one datagrid? so it wil display the date of the latest msg that has been posted by the user..?

[eeccll]

i guess i know how to do forum already..