public void TestMethodName()
        {
            // Arrange
            string nonIntegerString = "za";
            string actualOutput     = "";
            string expectedOutput   = "Bad String";

            // Act
            try
            {
                ConvertString.ToInteger(nonIntegerString);
            }
            catch (Exception ex)
            {
                actualOutput = ex.Message;
            }

            // Assert
            Assert.AreEqual(expectedOutput, actualOutput);
        }