public void TestHoldValue()
{
Matrix3By3 test = new Matrix3By3(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0);
Assert.AreEqual(1.0, test.M11);
Assert.AreEqual(2.0, test.M12);
Assert.AreEqual(3.0, test.M13);
Assert.AreEqual(4.0, test.M21);
Assert.AreEqual(5.0, test.M22);
Assert.AreEqual(6.0, test.M23);
Assert.AreEqual(7.0, test.M31);
Assert.AreEqual(8.0, test.M32);
Assert.AreEqual(9.0, test.M33);
}