You say, "I don't feel comfortable sharing that information" instead of the more hostile, "I don't have to answer that" One needs to consider it as offensive a

You say, "I don't feel comfortable sharing that information" instead of the more hostile, "I don't have to answer that" One needs to consider it as offensive as, "Are you planning to have a child soon" or "How old are you" or, "You look real purty" Also if a company is going to invite you all the way to their office and use up their current employees' time, it would be a very stupid thing to not want an applicant just because they don't want to discuss their current salary.