ACadSharp.Tables.DimensionStyle.AlternateDimensioningSuffix - DomCR/ACadSharp GitHub Wiki
Specifies a text prefix or suffix (or both) to the alternate dimension measurement for all types of dimensions except angular (see DIMAPOST System Variable).
For instance, if the current units are Architectural, is on (true), is 25.4 (the number of millimeters per inch), is 2, and AlternateDimensioningSuffix is set to "mm", a distance of 10 units would be displayed as 10"[254.00mm]. To turn off an established prefix or suffix (or both), set it to a single period (.).Namespace: ACadSharp.Tables.DimensionStyle
C#
DxfCodeValueAttribute
public String AlternateDimensioningSuffix { get; set; }String