This .NET class wraps the AcDb2LineAngularDimension ObjectARX class. 

This class represents the angular dimension defined by two lines (as opposed to three points) within AutoCAD.

Autodesk.AutoCAD.DatabaseServices.DBObject
    Autodesk.AutoCAD.DatabaseServices.Entity
        Autodesk.AutoCAD.DatabaseServices.Dimension
            Autodesk.AutoCAD.DatabaseServices.LineAngularDimension2

Public Class LineAngularDimension2
Inherits Dimension

public class LineAngularDimension2 : Dimension;

When a newly created dimension entity is first closed, an anonymous block will automatically be created for it to reference for display. The anonymous block is an BlockTableRecord that contains all the appropriate line, arc, arrowhead solids, text, and so on. It has *D as the block name prefix.

DBObject, Entity