public void VerifyGetMaxArrayValue()
 {
     double[] doubleArray = { 2, 2, 3, 5, 18, 0, 33, 1.6, 33.3 };
     //Assert.AreEqual(33.3, calc.GetArraySum(doubleArray));
     Assert.That(33.3, Is.EqualTo(calc.GetMaxArrayValue(doubleArray)));
 }