C# – Alternative to WPF DataGrid using .NET 3.5 SP1

You won't be able to use a different MultiSelector, as the one in the toolkit has a hard reference to the type in the SP1 version of the framework. Even if you did create your own MultiSelector for use, you would have to change the grid control to use yours, which would require decompiling it into source, modifying it, and then recompiling it, which beyond being a PITA, is probably a violation of the EULA as well.

As for a free data grid alternative, I would check out Xceeds DataGrid for WPF. The Express edition is free:

http://xceed.com/Grid_WPF_Intro.html

For large corporations, SP1 might still be slow to deploy to desktops - simply that it is a fair amount of testing etc, and unless you've got a good reason to do it, you'd be tempted not to.

And for individuals - it can be a big download unless you've got a fat pipe (which not everyone does).

For example, at my work we've deployed to the web-servers (since they need it), but not to user desktops. If I had a need to push SP1 I would, but I don't see much point until then.

You might also want to see if your code would run on Client Profile? This is then only a <30MB install away... although I've never actually seen anyone use Client Profile in anger (if you're going to have to do a deployment, heck: push the big one...).

So it really depends: who are the users of this app? Can you strong-arm them to upgrade? Or at least "encourage" them ;-p