private static extern void gsapi_delete_instance(System.IntPtr pinstance);

    Private Shared Sub gsapi_delete_instance(ByVal pinstance As System.IntPtr)

If Ghostscript has been initialized, then gsapi_exit must be called before gsapi_delete_instance.

       gsapi_delete_instance(pinstance);

This must be called on shudown if gsapi_init_with_args() had been called, just before gsapi_delete_instance().

        gsapi_delete_instance(pinstance);

    private static extern void gsapi_delete_instance(System.IntPtr pinstance);

        gsapi_delete_instance(inst);