How to call a method, passing arguments to the vs were fighting.

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the text just needs to change to another when the user presses enter and will happen again the method call keydown

what vs says when I can direct KeyEventArgs: "KeyEventArgs is the type that was invalid in this context"
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what actually is this?
it looks like you are trying to declare a method KeyDown. there's even the types of the parameters indicated
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You need to clean the types of the arguments of the call. It will look like: KeyDown(sender, e);

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