ArcGIS Pro 2.6 API Reference Guide
DotDensityRendererDefinition Class
Members 

ArcGIS.Desktop.Mapping Namespace : DotDensityRendererDefinition Class
Represents a dot density symbol renderer definition to show quantitative values for a field as a series of pattern fills based on the field value for each polygon
Syntax
public class DotDensityRendererDefinition : RendererDefinition 
Public Class DotDensityRendererDefinition 
   Inherits RendererDefinition
Remarks
With dot density symbology, the data you symbolize is not classified. Instead, quantitative values for one or more fields are represented as a collection of point symbols (typically solid circles or dots) within each polygon. Each dot represents a constant number of things, or people, or other quantifiable phenomena. The dots are equally sized, even when multiple fields are symbolized together within a layer.
Inheritance Hierarchy

System.Object
   ArcGIS.Desktop.Mapping.LayerDrawingDefinition
      ArcGIS.Desktop.Mapping.RendererDefinition
         ArcGIS.Desktop.Mapping.DotDensityRendererDefinition

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

See Also

Reference

DotDensityRendererDefinition Members
ArcGIS.Desktop.Mapping Namespace