How to select the datagrid row by hit the "Enter" key in Keyboard and also mouse double click in WPF

Hi Everybody,

                 I'm using data grid in my project. I want to select the row in two ways.

1. By hitting the Enter key

2. By mouse double click

Now i got by mouse double click.

How to do it the hitting by mouse.

Is there is any way to set short key for that datagrid mouse double click.

Please help me...