Fixes verification exception in .NET framework

src/EPPlus.Export.Pdf.Tests/App.config

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+	<runtime>
+		<gcAllowVeryLargeObjects enabled="true" />
+	</runtime>
+	<appSettings>
+		<add key="EPPlus:ExcelPackage.AllowCircularReferences" value="false" />
+		<add key="EPPlus:ExcelPackage:License" value="NonCommercialPersonal,EPPlus Test Project" />
+	</appSettings>
+</configuration>

src/EPPlus.Export.Pdf.Tests/EPPlus.Export.Pdf.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+     <TargetFrameworks>net481;net8.0</TargetFrameworks>
     <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <SignAssembly>True</SignAssembly>

src/EPPlus.Export.Pdf/DocumentObjects/Fonts/PdfCIDFont.cs

@@ -33,7 +33,7 @@ internal class PdfCIDFont : PdfObject
         private readonly CIDSystemInfo CIDInfoObject;
         private readonly int FontDescriptorObjectNumber;
 
-        private readonly int? DW;                               // Default width
+        private int? DW;                                        // Default width
         private readonly List<object> W;                        // Width array
         private readonly int[] DW2;                             // Default metrics for vertical writing (2 numbers)
         private readonly List<object> W2;                       // Vertical writing metrics
@@ -85,9 +85,9 @@ internal override string RenderDictionary()
             if (Subtype == CIDFontSubtype.CIDFontType2)
             {
                 if(string.IsNullOrEmpty( CIDToGIDMap ))
-                    sb.AppendFormat($"\n    /CIDToGIDMap {CIDToGIDMap}");
-                else
                     sb.AppendFormat($"\n    /CIDToGIDMap /Identity");
+                else
+                    sb.AppendFormat($"\n    /CIDToGIDMap {CIDToGIDMap}");
             }
             sb.Append(" >>");
             return sb.ToString();
@@ -121,9 +121,9 @@ internal override void RenderDictionary(BinaryWriter bw)
             if (Subtype == CIDFontSubtype.CIDFontType2)
             {
                 if (string.IsNullOrEmpty(CIDToGIDMap))
-                    sb.AppendFormat($"\n    /CIDToGIDMap {CIDToGIDMap}");
-                else
                     sb.AppendFormat($"\n    /CIDToGIDMap /Identity");
+                else
+                    sb.AppendFormat($"\n    /CIDToGIDMap {CIDToGIDMap}");
             }
             sb.Append(" >>");
             WriteAscii(bw, sb.ToString());

src/EPPlus.Export.Pdf/DocumentObjects/PdfBorderRenderer.cs

@@ -18,17 +18,17 @@ namespace EPPlus.Export.Pdf.DocumentObjects
 {
     internal class PdfBorderRenderer
     {
-        private readonly PdfCellBorderData Top;
-        private readonly PdfCellBorderData Bottom;
-        private readonly PdfCellBorderData Left;
-        private readonly PdfCellBorderData Right;
-        private readonly PdfCellBorderData DiagonalUp;
-        private readonly PdfCellBorderData DiagonalDown;
+        private PdfCellBorderData Top;
+        private PdfCellBorderData Bottom;
+        private PdfCellBorderData Left;
+        private PdfCellBorderData Right;
+        private PdfCellBorderData DiagonalUp;
+        private PdfCellBorderData DiagonalDown;
         private readonly double X;
         private readonly double Y;
         private readonly string Name;
         private readonly bool IsMerged;
-        private readonly MergedCellDrawInfo info;
+        private MergedCellDrawInfo info;
         private readonly double Width;
         private readonly double Height;
 

src/EPPlus/Export/PdfExport/TextMapping/PdfTextMap.cs

@@ -748,6 +748,7 @@ internal static PdfHeaderFooter GetTextFormats(PdfPageSettings pageSettings, Pdf
         /// <returns>The number of columns to add.</returns>
         internal static int AddColumnsForNonWrappedText(PdfPageSettings pageSettings, ExcelWorksheet ws, PdfWorksheet pdfSheet)
         {
+            if (ws.Dimension == null) return 0; //If dimension is null, there are no cells to check, so return 0.
             int columnsToAdd = 0;
             var catalog = new PdfCatalog();
             var lastColumn = ws.Dimension.End.Column;

src/EPPlusTest/Issues/ExportIssues.cs

@@ -1,4 +1,5 @@
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+using OfficeOpenXml;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -52,5 +53,15 @@ public void HtmlExportCRLFIssus2095()
                 Assert.AreEqual(cell, "<span style=\"font-size:11pt;font-family:Aptos Narrow;\">this\nis\na\nbug</span>");
             }
         }
+        [TestMethod]
+        public void GlyphPositioning_KerningAndMarkOffsets()
+        {
+            using var package = new ExcelPackage();
+            var ws = package.Workbook.Worksheets.Add("Sheet1");
+            ws.Cells["A1"].Value = "Test";
+            ws.Cells["A1:A2"].AutoFitColumns();
+            ws.SaveAsPdf(@"c:\epplusTest\Testoutput\GlyphPositioning.pdf");
+        }
+
     }
 }