public void TestMethod3()
        {
            //Arrange
            string str      = "(098) 123 4567";
            bool   expected = false;
            //Act
            bool actual = Challenge107.IsValidPhoneNumber(str);

            //Assert
            Assert.AreEqual(actual, expected);
        }
        public void TestMethod7()
        {
            //Arrange
            string str      = "abc(123)456-7890abc";
            bool   expected = false;
            //Act
            bool actual = Challenge107.IsValidPhoneNumber(str);

            //Assert
            Assert.AreEqual(actual, expected);
        }
        public void TestMethod14()
        {
            //Arrange
            string str      = "(519) 505-6498";
            bool   expected = true;
            //Act
            bool actual = Challenge107.IsValidPhoneNumber(str);

            //Assert
            Assert.AreEqual(actual, expected);
        }