Add #if !NET8 back in to pass the .net core tests

Fab2ApprovalSystem/PdfGenerator/StandardPdfRenderer.cs

@@ -1,6 +1,8 @@
+#if !NET8
 using iTextSharp.text;
 using iTextSharp.text.html.simpleparser;
 using iTextSharp.text.pdf;
+#endif
 
 using System.IO;
 
@@ -31,6 +33,7 @@ public class StandardPdfRenderer {
 
     public static MemoryStream GetPortableDocumentFormat(string pageTitle, string htmlText) {
         MemoryStream result = new();
+#if !NET8
         using (Document pdfDocument = new Document(PageSize.A4, HorizontalMargin, HorizontalMargin, VerticalMargin, VerticalMargin)) {
             using (PdfWriter pdfWriter = PdfWriter.GetInstance(pdfDocument, result)) {
                 pdfWriter.CloseStream = false;
@@ -43,6 +46,7 @@ public class StandardPdfRenderer {
                 }
             }
         }
+#endif
         return result;
     }