Silverlight 2.0 :

• Silverlight 2.0 includes a version of the .NET Framework, with the full Common Language Runtime as .NET Framework 3.0;
• So it can execute any .NET language including VB.NET and C# code.
• Unlike the CLR included with .NET Framework, multiple instances of the CoreCLR included in Silverlight can be hosted in one process.
• With this, the XAML layout markup file (.xaml file) can be augmented by code-behind code, written in any .NET language, which contains the programming logic.
• This version ships with more than 30 UI controls(including TextBox, CheckBox, Slider, ScrollViewer, and Calendar controls), for two-way databinding support, automated layout management (by means of StackPanel, Grid etc) as well as data-manipulation controls, such as DataGrid and ListBox.
• UI controls are skinnable using a template-based approach.