The value of the target property is animated by a key-frame animation. A transition among its target VALUES over its duration is created. However the targeted values can by any number.

The differences are:

Flash:
- Has no NOTION of animation other than MATRICES transformation.
- Binary shape records are used to store the shapes.
- Supports multiple video formats.
- Works in IE, Firefox, Safari and Chrome

Silverlight:
- Supports the WPF animation model.
- Uses XAML to output a simple XML object.
- Implements industry standard VC-1 codec for video and supports for WMV and WMA.
- Works after INSTALLING silverlight plug-in in IE
- Works after plug-in with warnings about the execution, was installed and works
- Not supported by Safari
- The animated box will be shown but will not ANIMATE.

The value of the target property is animated by a key-frame animation. A transition among its target values over its duration is created. However the targeted values can by any number.

The differences are:

Flash:
- Has no notion of animation other than matrices transformation.
- Binary shape records are used to store the shapes.
- Supports multiple video formats.
- Works in IE, Firefox, Safari and Chrome

Silverlight:
- Supports the WPF animation model.
- Uses XAML to output a simple XML object.
- Implements industry standard VC-1 codec for video and supports for WMV and WMA.
- Works after installing silverlight plug-in in IE
- Works after plug-in with warnings about the execution, was installed and works
- Not supported by Safari
- The animated box will be shown but will not animate.