use dataset to pass data in web form application

Question

I need to pass information between 2 new web pages in a new C# 2010 web form application.
I will need to pass information that would update two different tables. One table contains about 50 columns that would update one row in the table called 'main'. The second table called 'sub' only has 4 columns in each row. However the second table is joined to the fist table and can have from 1 to 400 rows that  ties to the 'main' table.

Could I pass the information between the passes using a dataset that contains two data tables?  Is that a possibility?

Thus I am wondering what option would be the best for my situation?