Check/uncheck checkbox in datagrid in silverlight

Question

I  have to create datagrid with checkbox and data is fetching from database and if user select the checkbox all checkbox should get selected. I have provided delete button if user select all checkbox and click on delete it should get delete and if the user select one or more checkbox and clicks on delete it aslo get deleted how can i do that in silverlight.

Can any1 help me on this.

I have attached the image aslo.