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Application.VersionBuild

Property
Description:
Returns the internal build number of the Autodesk Revit application.
Remarks:
This property can be used by your application to find the version of Autodesk Revit against which your application is running. Based on this information your application can report if it is able to work correctly with that version of Autodesk Revit.
Syntax
public string VersionBuild { get; }