What is the difference between WPF and Silverlight application?

Question

What is the difference between WPF and Silverlight application? Are they the same?

Answer 1

WPF is essentially the replacement to Winforms in that it is a desktop application platform built on the .Net (3+) platform.

Silverlight represents a subset of WPF that is delivered through a browser plug-in, much like Flash/Flex.