public void Dispose() { if (!_disposed) { NativePdfiumMethods.FORM_DoPageAAction(Page, _form, NativePdfiumMethods.FPDFPAGE_AACTION.CLOSE); NativePdfiumMethods.FORM_OnBeforeClosePage(Page, _form); NativePdfiumMethods.FPDFText_ClosePage(TextPage); NativePdfiumMethods.FPDF_ClosePage(Page); _disposed = true; } }