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Is there a way to execute a piece of code before an event occurs?
example when we say Expanded=”OnExpand”
here the code inside OnExpand occurs after the Expanded event occurs. What if I want to execute a piece of code before that?
If you’re talking about the Expander control, you could subclass it and override the IsExpanded property, raising your own PreviewExpanded event before calling
base.IsExpanded = value;