The custom axis to try (if extrusionAxes includes an option for a custom direction).

Namespace: Autodesk.Revit.DB.IFC
Assembly: RevitAPIIFC (in RevitAPIIFC.dll) Version: 24.0.0.0 (24.0.0.0)
Since: 2012

Syntax

C#
`public XYZ CustomAxis { get; set; }`

Visual Basic
`Public Property CustomAxis As XYZ Get Set`

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

Exceptions

Exception	Condition
Autodesk.Revit.ExceptionsArgumentNullException	When setting this property: A non-optional argument was null