The FaceSecondDerivatives type exposes the following members.
Properties
| Name | Description | |
|---|---|---|
 | IsValidObject | Specifies whether the .NET object represents a valid Revit entity. |
| MixedDerivative | The mixed derivative. |
| UUDerivative | The second derivative with respect to U. |
| VVDerivative | The second derivative with respect to V. |