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# WKExtensionDelegateClassName

The name of your watchOS app’s extension delegate.

## Discussion

This key provides the name of a class that adopts the <doc://com.apple.documentation/documentation/WatchKit/WKExtensionDelegate> protocol. Xcode automatically includes this key in the WatchKit extension’s information property list when you create a watchOS project from a template. You only modify this value when you rename or replace the extension delegate.

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