Allow for Database changes
<p>can anyone tell me approaches to tackling the following which is a very typical use case.</p>

<p>User 1 is editing page 1 which is modifying a users roles etc.
User 2 is also modifying the same user as user 1.
How do i prevent the changes overwriting one another???</p>

<p>this is for asp.net site with framework 3.5???</p>

<p>thanks
Niall</p>
