The background fill pattern Id.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 22.0.0.0 (22.1.0.0)
Since: 2019

Syntax

C#
`public ElementId BackgroundPatternId { get; set; }`

Visual Basic
`Public Property BackgroundPatternId As ElementId Get Set`

Visual C++
`public: property ElementId^ BackgroundPatternId { ElementId^ get (); void set (ElementId^ value); }`

Remarks

The FillPattern used for a background pattern must have a 'Drafting' target.

Exception	Condition
Autodesk.Revit.Exceptions ArgumentException	When setting this property: The element id must represent a valid FillPatternElement. -or- When setting this property: The FillPattern target must be a drafting pattern.
Autodesk.Revit.Exceptions ArgumentNullException	When setting this property: A non-optional argument was null