How do I find which eventargs class to use in asp.net control event

If I add an event to my control in the markup, eg in and EntityDa开发者_开发问答taSource add a OnUpdating, how can I find the method parameter list?

eg how do I know to put in

(object sender, EntityDataSourceChangingEventArgs e)

instead of

(object sender, EventArgs e)

In a FormView OnDataBinding event is there a more specific EventArgs class than

(object sender, EventArgs e)

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It is defined by the event signature. Not much you can, but rewrite the code if you can.

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In that case I would just type in EntityDataSource OnUpdating into google....almost always within the first few results I'll see an example with the correct parameter list.