'Get instance of control whose event I am in

Is there a way to get an instance of the control whose event I am in?

    private void TextBox1_TextChanged(object sender, EventArgs e)
    {
        TextBox1.Text = "hi";
        ThisControl.Text = "hi";
    }

Sort of so that these two lines would do the same thing? Like the "This" keyword but for the event control rather than the class.

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