SilverLight Header Column should be the Checkbox in dynamically created datagrid

Hi,

here I'm Creating the Dynamic datagrid for this DataGridTemplateColumn I'm creating using the StringBuilder and I'm assigning using append method.

But I need the header to be the Checkbox ..How can I create the Header of the particular datagrid column as the CheckBox

Help me out to resolve this

Thank you in Advance.

Mani--MSDN