Bob.cs

{
    public class Bob
    {

        internal string hey(string remark)
        {
            if (NotSayingAnything(remark))
            {
                return "Fine. Be that way!";
            }
            if (IsShouting(remark))
            {
                return "Whoa, chill out!";
            }
            if (IsQuestion(remark))
            {
               return "Sure.";
            }
            
            return "Whatever.";
        }

        private bool NotSayingAnything(string remark)
        {

            if (string.IsNullOrWhiteSpace(remark))
                return true;
            return false;
        }

        private bool IsQuestion(string remark)
        {
            if (remark.EndsWith("?"))
                return true;
            return false;
        }

        private bool IsShouting(string remark)
        {
            if (!remark.ToCharArray().Any(c => char.IsUpper(c)))
                return false;

           bool allUpperCase = remark.ToCharArray().All(c => char.IsUpper(c)|| char.IsPunctuation(c)|| char.IsSeparator(c)||char.IsSymbol(c)||char.IsNumber(c));
            return allUpperCase;
        }
    }


}