Probably your formatting options are wrong, go to: Tools -> Options -> Text Editor -> XAML -> Formatting -> Spacing and on Attribute Spacing section click “Position each attribute on a separete line” and then try “Ctrl+K+D” again.
Probably your formatting options are wrong, go to: Tools -> Options -> Text Editor -> XAML -> Formatting -> Spacing and on Attribute Spacing section click “Position each attribute on a separete line” and then try “Ctrl+K+D” again.