The minor version number of Revit
Namespace: Autodesk.Revit.ApplicationServicesAssembly: RevitAPI (in RevitAPI.dll) Version: 20.0.0.0 (20.0.0.377)
Since: 2018
Syntax
Remarks
SubVersionNumber of Revit may have additional APIs and functionality not available in the standard customer releases.
Add-ins written to support standard Revit releases should be compatible with SubVersionNumber releases,
but add-ins written specifically targeting new features in SubVersionNumber releases would not be compatible with the standard releases.