public void MaxChar()
        {
            MaxChar maxChar = new MaxChar();

            string key   = "";
            int    value = 0;

            var result = maxChar.ObterMaxChar("Hello There!");

            foreach (var item in result)
            {
                if (value < item.Value)
                {
                    key   = item.Key.ToString();
                    value = item.Value;
                }
            }

            Assert.AreEqual("e", key);
            Assert.AreEqual(3, value);
        }
        public void MaxCharSegundoExemplo()
        {
            MaxChar maxChar = new MaxChar();

            string key   = "";
            int    value = 0;

            var result = maxChar.ObterMaxChar("apple 1231111");

            foreach (var item in result)
            {
                if (value < item.Value)
                {
                    key   = item.Key.ToString();
                    value = item.Value;
                }
            }

            Assert.AreEqual("1", key);
            Assert.AreEqual(5, value);
        }