Want the source code and unit tests for the managed Silverlight 2 controls included in System.Windows.dll, System.Windows.Controls.dll, and System.Windows.Controls.Data.dll? Here you go…

Microsoft Downloads - Sample Source Code for Silverlight 2 Runtime and SDK Controls

“This download contains the source code and unit tests for the managed Silverlight 2 controls included in System.Windows.dll, System.Windows.Controls.dll, and System.Windows.Controls.Data.dll.

File Name:	Silverlight 2 Control Sample Source Code and Apps.exe
Version:	2
Date Published:	1/7/2009
Language:	English
Download Size:	881 KB

…

To develop Silverlight-based applications that use the Silverlight 2 controls, you do not need this source code. The source code for the Silverlight 2 controls enables you to learn the inner workings of the controls. This is useful if you want to extend the controls or use them as a reference implementation when you implement your own controls. Complete unit tests provide additional guidance in developing polished, professional controls.

The source code for the Silverlight 2 controls includes implementations for the following controls:

• ButtonBase
• Button
• HyperlinkButton
• CheckBox
• RadioButton
• CheckBox
• ToogleButton
• RepeatButton
• RangeBase
• Slider
• ScrollBar
• ProgressBar
• Calendar
• DataGrid
• DatePicker
• GridSplitter
• TabControl

…”

The download is a self extracting zip file with a ton of source (C#) and tests. Just the thing to get the blood pumping on a Thursday… ;)

BTW, you’ll need the “Microsoft® Silverlight™ Tools for Visual Studio 2008 SP1” installed in order to open these projects/solutions (funny that… lol ;)