如何在Silverlight datagrid中删除鼠标悬停高光和选定的行高光

I've got a datagrid with one button in each row (xaml shown below). I'm trying to get rid of the blue highlighting functionality where it highlights the selected row, and the row with the mouse over it. I'm trying to seit it up so you just click on the button without getting the row selection and mouseover highlight functionality. I tried setting IsHitTestVisible to false, but then the button is not clickable. How can I do this?I've got a datagrid with one button in each row