The Internet Explorer 9 Compatibility Cookbook is designed to help you understand changes in Windows Internet Explorer 9 that might impact applications that you developed for earlier versions of Internet Explorer. Many changes help Internet Explorer comply with broader industry standards, and other changes improve performance and reliability.

The cookbook includes information about changes to features, identifies features that are deprecated or removed, and describes general tools and guidance.

In general, if your product works with IE 8 then you should see few problems when your customers start using it using IE 9.

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