I am trying to find a WPF 3.0 date picker control. What can you recommend and where is it?
The WPF Toolkit contains a DatePicker control.
Edit: I forgot to add a link to the DatePicker Walkthrough for info how to use it.
Update: There is no DatePicker control from Microsoft that runs on .Net 3.0. You can either buy a third party DatePicker control, like Telerik's DatePicker for example, or you can go with start with an open source DatePicker implementation and roll your own. Disclaimer: I have not used either of the third party DatePicker controls, so I can't vouch about their quality.
The book Applications = Code + Markup (Charles Petzold) in Chapter 25 has a datePicker control that the Microsoft team has converted to VB.net. The control is written for .Net 3.0. Here is a link to the control and source code.
There's a free date picker control in Kevin's WPF bag-o-tricks at http://j832.com/bagotricks/
And in MS WPF toolkit has Franci Penov said.
I've used the bag-o-tricks one in the past, it works but it isn't perfect.
You can also give a look at these free wpf controls. There is a free datetimeeditor in the suite.