Data table from one Xaml window to another

Hi friends

I have a datable in mainwindow.xaml   window_loaded event . I would like to pass this data table from this window

to another WPF window searchwindow.xaml which opens on a button click.

Also here on the searchwindow.xaml , i would like query this datatable and them bind the results to a gridview. Please guide me on this..Thank you