- 68 -17.34. NotSupportedExceptionAn exception that is thrown when an attempt is made to carry out a function that is not supported.¾ Syntax[VB]Public Class NotSupportedExceptionInherits System.IO.PlatformNotSupportedException[C#]public class NotSupportedException: System.IO.PlatformNotSupportedException¾ NamespaceDNWA.BHTCL¾ AssemblyDNWA.Exception.dll