public static RotationalStiffness MeganewtonMetersPerDegree <T>(this T value) =>
 RotationalStiffness.FromMeganewtonMetersPerDegree(Convert.ToDecimal(value));
 public void NumberToMeganewtonMetersPerDegreeTest() =>
 Assert.Equal(RotationalStiffness.FromMeganewtonMetersPerDegree(2), 2.MeganewtonMetersPerDegree());