Two Controls Calling Same Method?

I have 2 text boxes inside my aspx page and I want to call the same method func(object sender, EvenArgs ev) on ontextchanged events of these textboxes.I want to parse the text of these textboxes inside this function - now the question is how would func(object sender, EvenArgs ev) know which of the textbox's has called it? I need to know that so that I could then use text property of that textbox to parse it and further process it.Isn't there a thing like sender.equals(textbox1).Or probably is there a way I could pass the text as a string argument to func()? If yes, how and whats the format?I dont want to make two functions separately for ontextchanged events of these textboxes, when the fucntionality of this method remains exactly the same.