XSettings LicenseValid Property. Whether the current license is valid. ABCpdf .NET PDF Library. From ABCpdf .net previous page next page LicenseValid Property Type Default Value Read Only Description [C#]bool[Visual Basic]Boolean None Yes Whether the current license is valid. Notes This property determines whether the current license is valid. After installing a license, you may wish to check that it is installed and valid using this property. Example None. previous page start next page