public void Can_Add_New_Lines()
{
sut.AddPlane(p1);
sut.AddPlane(p2);
var results = sut.Planes.OrderBy(x => x.Name).ToArray();
Assert.AreEqual(results.Length, 2);
Assert.AreEqual(results[0], p1);
Assert.AreEqual(results[1], p2);
}