1. WPF is restricted windows operating systems. Silverlight application is used irrespective of operating system.
2. WPF full support to 3D. Silverlight has minimal support to 3D.
3. WPF utilize local resources. Silverlight can't utilize local resources.
4. Desktop use WPF. For online use is Silverlight.
5.Silverlgiht is subset of WPF
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