Does DataForm exist in Silverlight 4, or only in Silverlight 3?

Silverlight's DataForm seems great. I see a ton of documentation for it in SL3, but not so much in SL4.

This tutorial is about SL4, but has way more XAML than I'd like to write, particularly given that DataForm is supposed to do all that for you.

I've also been following along with this video, but he loses me when he references the System.Windows.Controls.Data.DataForm assembly. For me, that doesn't work:

Assembly 'System.Windows.Controls.Data.DataForm' was not found. Verify that you are not missing an assembly reference. Also, verify that your project and all referenced assemblies have been built.

Am I doing something wrong here? I can't find a System.Windows.Controls.Data.DataForm assembly to which to add a refe开发者_开发技巧rence. Did it get moved from SL3 to SL4?

Frustratingly, I can't seem to find official DataForm documentation on MSDN.

UPDATE: I found a list of controls on MSDN. It doesn't include DataForm. Does that mean it's gone?

UPDATE 2: I created two projects in Expression Blend, one in SL3 and the other in SL4. I can't find DataForm as a control for either. For shame.

The DataForm still exists and its assembly is System.Windows.Controls.Data.DataForm.Toolkit.