How to select a specific record from the table using Entity Framework?

How to select a specific record from the table using Entity Framework?

I'm using Entity Framework to insert data in a database. Here is the table
in my application http://prikachi.com/images/681/6555681G.jpg. What I want
to do is when I click "Edit" to select the concrete record and to have the
option to edit or update it the way it is done here
http://www.codeproject.com/KB/library/363040/updatedelete.jpg. I'm using
Visual Studio 2012, C#.