This .NET class wraps the AcDbDimStyleTableRecord ObjectARX class. 

Objects of this class represent the records found in the DimStyleTable. Each of these records contains the information necessary to generate a specific appearance (that is, text above, in, or below the line; arrows, slashes, or dots at the end of the dimension line, and so on) for dimensions that reference it.

Autodesk.AutoCAD.DatabaseServices.DBObject
    Autodesk.AutoCAD.DatabaseServices.SymbolTableRecord
        Autodesk.AutoCAD.DatabaseServices.DimStyleTableRecord

Public Class DimStyleTableRecord
Inherits SymbolTableRecord

public class DimStyleTableRecord : SymbolTableRecord;

For dimensioning, it is often desirable to have a set of similar styles that are essentially variations on a theme, with each style intended for a different dimension type (that is, angular, linear, radial, and so on). Such a group of styles is known as an DimStyle family.