All parts of an extruded roof must face upward. Make sure that no part of the sketch lies below any other part of the sketch.

public static FailureDefinitionId NonMonotoneRoof { get; }

Public Shared ReadOnly Property NonMonotoneRoof As FailureDefinitionId
	Get

public:
static property FailureDefinitionId^ NonMonotoneRoof {
	FailureDefinitionId^ get ();
}