The roughness of Duct Lining.

Namespace: Autodesk.Revit.DB.Mechanical
Assembly: RevitAPI (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0)
Since: 2012

Syntax

C#
`public double Roughness { get; set; }`

Visual Basic
`Public Property Roughness As Double Get Set`

Visual C++
`public: property double Roughness { double get (); void set (double value); }`

Exceptions

Exception	Condition
Autodesk.Revit.Exceptions ArgumentOutOfRangeException	When setting this property: The roughness value should be at least equal to or larger than 0.
Autodesk.Revit.Exceptions DisabledDisciplineException	When setting this property: None of the following disciplines is enabled: Mechanical Electrical Piping.