public void ToArray()
{
double x = 23.4;
double y = -11.0;
double z = 0.0;
double w = 0.3;
VectorD v = new VectorD(new[] { x, y, z, w });
double[] values = v.ToArray();
Assert.AreEqual(x, values[0]);
Assert.AreEqual(y, values[1]);
Assert.AreEqual(z, values[2]);
Assert.AreEqual(w, values[3]);
Assert.AreEqual(4, values.Length);
}