This .NET class wraps the AcDbDimData ObjectARX class. 

The DynamicDimensionData class supports dynamic dimensions for objects derived from Entity. 

Dynamic dimensions are temporary Dimension objects that can be invoked and displayed when new database entities or grip-editing database-resident entities are created. DynamicDimensionData objects are usually created by an application or custom object and displayed and managed by AutoCAD.

Autodesk.AutoCAD.DatabaseServices.DynamicDimensionData

Public sealed Class DynamicDimensionData
Inherits DisposableWrapper

public sealed class DynamicDimensionData : DisposableWrapper;