public ElementId ForegroundPatternId { get; set; }

Public Property ForegroundPatternId As ElementId
	Get
	Set

public:
property ElementId^ ForegroundPatternId {
	ElementId^ get ();
	void set (ElementId^ value);
}

When the FilledRegionAttributes element is in a family then the FillPattern used for a foreground pattern must have a 'Drafting' target. In addition, when the FilledRegionAttributes element is in a family, the pattern cannot be the solid fill pattern unless the 'IsMasking' property is set to true. InvalidElementId is used when there is no foreground pattern