display selceted rows of one datagrid to the second datagrid?

Question

hi,
   in my project i am need to display selceted rows of one datagrid  to the second datagrid. i am display checkboxes to the first datagrid,
user select that checkboxes, selected checkbox rows all are displayed in second datagrid,
how to do this, please give me a code todo this urgent sir.
Thanks.