ArcGIS Pro 2.6 API Reference Guide
FilterDefinition Class
Members 

ArcGIS.Desktop.Mapping Namespace : FilterDefinition Class
Represents a building scene layer filter definition. A filter definition contains up to two FilterBlockDefinition - one for rendering the building as solid, one for rendering the building as a mesh (wire frame). Once you define a filter, call SetFilter to apply it to the given building scene layer.
Syntax
public sealed class FilterDefinition 
Public NotInheritable Class FilterDefinition 
Remarks
A filter definition contains up to two FilterBlockDefinition - one for rendering the building as solid, one for rendering the building as a mesh (wire frame). Once you define a filter, call SetFilter to apply it to the given building scene layer.
Inheritance Hierarchy

System.Object
   ArcGIS.Desktop.Mapping.FilterDefinition

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

See Also

Reference

FilterDefinition Members
ArcGIS.Desktop.Mapping Namespace