It looks like Silverlight and WinRT have a lot of API in common. The WinRT Genome Project from Programmer Payback has a nice Venn diagram of the overlaps; and a link to a complete Silverlight 5 vs. WinRT comparison by namespace.
It looks like Silverlight and WinRT have a lot of API in common. The WinRT Genome Project from Programmer Payback has a nice Venn diagram of the overlaps; and a link to a complete Silverlight 5 vs. WinRT comparison by namespace.