Create the PdfAcroFieldEnumerator for PdfAcroFieldCollection

.editorconfig

@@ -78,6 +78,7 @@ dotnet_style_namespace_match_folder = true:suggestion
 dotnet_style_prefer_collection_expression = when_types_loosely_match:suggestion
 dotnet_style_readonly_field = true:suggestion
 dotnet_style_require_accessibility_modifiers = for_non_interface_members:silent
+dotnet_style_allow_multiple_blank_lines_experimental = true:silent
 
 [*.cs]
 csharp_indent_labels = one_less_than_current
@@ -111,4 +112,7 @@ csharp_style_deconstructed_variable_declaration = true:suggestion
 csharp_style_unused_value_assignment_preference = discard_variable:suggestion
 csharp_style_unused_value_expression_statement_preference = discard_variable:silent
 csharp_prefer_static_local_function = true:suggestion
-csharp_style_prefer_readonly_struct = true:suggestion
+csharp_style_prefer_readonly_struct = true:suggestion
+csharp_prefer_system_threading_lock = true:suggestion
+csharp_prefer_static_anonymous_function = true:suggestion
+csharp_style_prefer_readonly_struct_member = true:suggestion

.gitignore

@@ -3,9 +3,7 @@
 assets/
 TestResults/
 localtests/
-.nuget/
 .build/
-.testPublish/
 *.sln.ide/
 _ReSharper.*/
 .idea/
@@ -15,41 +13,43 @@ PublishProfiles/
 .vs/
 .vscode/
 .idea/
-bower_components/
-node_modules/
+# bower_components/
+# node_modules/
+zip/
 debugSettings.json
 project.lock.json
 *.log
 *.user
-*.suo
+#*.suo
 *.cache
-*.docstates
+#*.docstates
+*.zip
 _ReSharper.*
 nuget.exe
-*net45.csproj
-*net451.csproj
-*k10.csproj
-*.psess
+#*net45.csproj
+#*net451.csproj
+#*k10.csproj
+#*.psess
 *.vsp
 *.pidb
 *.userprefs
 *DS_Store
-*.ncrunchsolution
-nCrunchTemp*.*
-*.*sdf
-*.ipch
-.settings
+#*.ncrunchsolution
+#nCrunchTemp*.*
+#*.*sdf
+#*.ipch
+#.settings
 *.sln.ide
 node_modules
 # *launchSettings.json
 *.orig
 *.nuget.props
 *.nuget.targets
-/localfeed
-oldstate.json
-InternalAgentState.json
+#/localfeed
+#oldstate.json
+#InternalAgentState.json
 /nuget.config
 *.log
-*tempfile.*
+#*tempfile.*
 launchsettings.json
 testEnvironments.json

.globalconfig

@@ -0,0 +1,3 @@
+is_global = true
+
+dotnet_diagnostic.IDE0290.severity = suggestion

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2001-2025 empira Software GmbH, Troisdorf (Cologne Area), Germany
+Copyright (c) 2001-2026 empira Software GmbH, Troisdorf (Cologne Area), Germany
 
 http://docs.pdfsharp.net
 

PdfSharp.sln.DotSettings

@@ -6,10 +6,12 @@
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=BSD/@EntryIndexedValue">BSD</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=CF/@EntryIndexedValue">CF</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=CR/@EntryIndexedValue">CR</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=DA/@EntryIndexedValue">DA</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=IO/@EntryIndexedValue">IO</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=IV/@EntryIndexedValue">IV</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=MD/@EntryIndexedValue">MD</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=OSX/@EntryIndexedValue">OSX</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=OT/@EntryIndexedValue">OT</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=SASL/@EntryIndexedValue">SASL</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=TSA/@EntryIndexedValue">TSA</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=URI/@EntryIndexedValue">URI</s:String>
@@ -23,6 +25,7 @@
 	<s:String x:Key="/Default/PatternsAndTemplates/Todo/TodoPatterns/=961894CCC510410ABE2B99132B253C80/TodoIconStyle/@EntryValue">Edit</s:String>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=AESV/@EntryIndexedValue">True</s:Boolean>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=ID/@EntryIndexedValue">ID</s:String>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=annots/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=ARGB/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=ascender/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=bijective/@EntryIndexedValue">True</s:Boolean>
@@ -32,6 +35,7 @@
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=cmap/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Cmyk/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Codepoints/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=decendants/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=decryptor/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=didn/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Doesn/@EntryIndexedValue">True</s:Boolean>
@@ -40,6 +44,7 @@
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Endian/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=endianness/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=endstream/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=Factur/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Failsafe/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=flate/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=flavlor/@EntryIndexedValue">True</s:Boolean>
@@ -67,6 +72,7 @@
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Semilight/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=shouldn/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=stringprep/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=subdictionary/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=subpath/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=tabstop/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=tabstops/@EntryIndexedValue">True</s:Boolean>

README.md

@@ -1,12 +1,12 @@
-# PDFsharp & MigraDoc 6
+# PDFsharp & MigraDoc 7
 
-Version **6.2.0**  
-Published **2025-05-19**
+Version **7.0.0 Preview 1**  
+Published **2026-03-24**
 
-This is a final version of the **PDFsharp** project, the main project of PDFsharp & MigraDoc 6 with updates for C# 12 and .NET 6.
+This is a preview version of the **PDFsharp** project, the main project of PDFsharp & MigraDoc 7 with updates for C# 12 and .NET 8, .NET 9, and .NET 10.
 
-PDFsharp: Copyright (c) 2005-2025 empira Software GmbH, Troisdorf (Cologne Area), Germany
-MigraDoc: Copyright (c) 2001-2025 empira Software GmbH, Troisdorf (Cologne Area), Germany
+PDFsharp: Copyright (c) 2005-2026 empira Software GmbH, Troisdorf (Cologne Area), Germany
+MigraDoc: Copyright (c) 2001-2026 empira Software GmbH, Troisdorf (Cologne Area), Germany
 Published Open Source under the [MIT License](https://docs.pdfsharp.net/LICENSE.html)
 
 For more information see [docs.pdfsharp.net](https://docs.pdfsharp.net/)
@@ -15,7 +15,7 @@ For more information see [docs.pdfsharp.net](https://docs.pdfsharp.net/)
 
 Project documentation can be found on our DOCS site: <https://docs.pdfsharp.net>.
 
-Note: PowerShell 7 is required to execute the PowerShell scripts that come with PDFsharp.
+Note that PowerShell 7 is required to execute the PowerShell scripts that come with PDFsharp.
 
 ### Download assets first
 
@@ -34,9 +34,10 @@ Execute
 `dotnet build` should build the solution without any warnings or errors.
 
 * You need the latest .NET SDK version installed
-* Please note that you need a git repository with at least one commit in order to build the PDFsharp solution.  
+* ~~Please note that you need a git repository with at least one commit in order to build the PDFsharp solution.  
   Without a git repository with at least one commit, you will get an error message from `GitVersion.MsBuild` while building the solution.
-  You can set a tag to define a valid version, e.g.: `git tag v6.2.0` to make it build with a specific version number. Without tag, version 0.1.0 will be used.
+  You can set a tag to define a valid version, e.g.: `git tag v6.2.0` to make it build with a specific version number. Without tag, version 0.1.0 will be used.~~  
+  (Is now done automatically by BuildConfig)
 
 ### Central package management
 

dev/GetAllPDFs.ps1

@@ -0,0 +1,41 @@
+# Chat/GPT creates this script for me. That is why comments are German.
+# param(
+#     [Parameter(Mandatory = $true)]
+#     [string]$SourcePath,
+
+#     [Parameter(Mandatory = $true)]
+#     [string]$DestinationPath
+# )
+
+TODO verschieben
+
+$SourcePath = "D:\repos\emp\PDFsharp.iText\itext.tests"
+$DestinationPath = "D:\repos\emp\PDFsharp\assets\private\test-files"
+
+# Zielverzeichnis erstellen, falls es nicht existiert
+if (-not (Test-Path -Path $DestinationPath)) {
+    New-Item -ItemType Directory -Path $DestinationPath | Out-Null
+}
+
+# Alle PDF-Dateien rekursiv suchen
+$files = Get-ChildItem -Path $SourcePath -Recurse -Filter *.pdf
+
+foreach ($file in $files) {
+    # Dateiname ermitteln
+    $destFile = Join-Path $DestinationPath $file.Name
+
+    # Falls Datei schon existiert → eindeutigen Namen erzeugen
+    if (Test-Path $destFile) {
+        $baseName = [System.IO.Path]::GetFileNameWithoutExtension($file.Name)
+        $extension = $file.Extension
+        $counter = 1
+        do {
+            $newName = "$baseName`_$counter$extension"
+            $destFile = Join-Path $DestinationPath $newName
+            $counter++
+        } while (Test-Path $destFile)
+    }
+
+    # Datei kopieren
+    Copy-Item -Path $file.FullName -Destination $destFile
+}

dev/README.md

@@ -15,3 +15,9 @@ Builds NuGet packages for release on NuGet.org.
 
 ## run-tests
 Run unit tests on Windows and WSL2.
+
+## set-en.ps1
+Sets UI language for dotnet build etc. to en-US.
+
+## zip-PDFsharp.ps1
+Creates a PDFsharp.zip file.

dev/_update-local-nuget-packages.ps1

@@ -22,21 +22,70 @@ $b = "`e[94m"
 $r = "`e[0m"
 
 # Set working directory to solution root.
-Push-Location $PSScriptRoot
-Push-Location .\..
+Push-Location $PSScriptRoot\..
 
-Write-Host "Copy all `e[93m$($config.ToUpperInvariant())$r NuGet packages to $b$nugetLocal$r."
-New-Item -Path $nugetLocal -ItemType directory -Force | Out-Null
-$packages = @()
-Get-ChildItem -Path . -Filter *.nupkg -Recurse -ErrorAction SilentlyContinue -Force | ForEach-Object {
-    if ($_.FullName -match "bin\\$config|bin\/$config") {
-        Copy-Item $_.FullName -Destination ("$nugetLocal\" + $_.Name)
-        $packages += $_.Name
+# Machine local NuGet packages
+# Do not copy packages into user profile folder NugetFolder
+# if .nuget-local does not exist.
+if (Test-Path -Path $nugetLocal) {
+    # User has a local NuGet directory.
+} else {
+    $nugetLocal = ""
+}
+
+# Project local NuGet packages (if PDFsharp is used as submodule)
+# Do not copy packages into .nuget directory if PDFsharp is not used
+# as a submodule and therefore .nuget does not exist in project directory.
+$nugetProject = "..\..\.nuget"  # because of this: YOUR-PROJECT/modules/PDFsharp
+if (Test-Path -Path $nugetProject) {
+    # PDFsharp is a submodule and the outer project has a .nuget directory.
+    $nugetProject = $nugetProject
+} else {
+    $nugetProject = ""
+}
+
+$hasNugetLocal = $nugetLocal.Length -gt 0
+$hasNugetProject = $nugetProject.Length -gt 0
+
+if ($hasNugetLocal -or $hasNugetProject)
+{
+    if ($hasNugetLocal -and $hasNugetProject)
+    {
+        $targetFolders = "$b$nugetLocal$r and $b$nugetProject$r"
+    }
+    elseif ($hasNugetLocal)
+    {
+        $targetFolders = "$b$nugetLocal$r"
     }
+    elseif ($hasNugetProject)
+    {
+        $targetFolders = "$b$nugetProject$r"
+    }
+
+    Write-Output "Copy all `e[93m$($config.ToUpperInvariant())$r NuGet packages to $targetFolders."
+    # Do not force creation of directory anymore.
+    # New-Item -Path $nugetLocal -ItemType directory -Force | Out-Null
+    $packages = @()
+    Get-ChildItem -Path . -Filter *.nupkg -Recurse -ErrorAction SilentlyContinue -Force | ForEach-Object {
+        if ($_.FullName -match "bin\\$config|bin\/$config") {
+            if ($nugetLocal.Length -gt 0) {
+                Copy-Item $_.FullName -Destination ("$nugetLocal\" + $_.Name)
+            }
+            if ($nugetProject.Length -gt 0) {
+                Copy-Item $_.FullName -Destination ("$nugetProject\" + $_.Name)
+            }
+            $packages += $_.Name
+        }
+    }
+    Write-Output "  $b$($packages.Count)$r packages copied."
 }
-Write-Host "  $b$($packages.Count)$r packages copied."
+else
+{
+    Write-Output "No `e[93m$($config.ToUpperInvariant())$r NuGet packages are copied as there is no .nuget-local and no main module .nuget folder."
+}
+
 
-Write-Host "Delete all existing old package folders in $b$nuget$r folder."
+Write-Output "Delete all existing old package folders in $b$nuget$r folder."
 $count = 0
 $versions = @()
 $packages | ForEach-Object {
@@ -63,10 +112,11 @@ $packages | ForEach-Object {
         }
     }
 }
-Write-Host "  $b$count$r package $($deleteAllPackageVersions ? '' : 'version ')folders deleted in $b$nuget$r."
+Write-Output "  $b$count$r package $($deleteAllPackageVersions ? '' : 'version ')folders deleted in $b$nuget$r."
 if ($packages.Count -gt 0) {
-    Write-Host "  New version number(s) : $b$Versions$r"
+    # In case you build several times and do not delete the artifacts
+    # you can have more than one set of NuGet packages 
+    Write-Output "  The new version number(s) are: $b$Versions$r"
 }
 
 Pop-Location
-Pop-Location

dev/build-local-nuget-packages-release.ps1

@@ -1,4 +1,16 @@
-# Updates local nuget packages.
+<#
+.SYNOPSIS
+    Build PDFsharp with config release and updates the local nuget packages.
+
+.DESCRIPTION
+    The script deletes all artifacts and builds a PDFsharp release version.
+    It first builds the PdfSharp.BuildConfig.csproj to ensure that SemVersion.props and 
+    PDFsharpBuildConfig.props are up-to-date before the build process starts.
+    The created packages are copied to two locations.
+    The first is the .nuget-local directory in your user profile directory.
+    The second is the .nuget directory in the root folder of your project in case
+    you used PDFsharp as a submodule.
+#>
 
 #Requires -Version 7
 #Requires -PSEdition Core
@@ -9,31 +21,35 @@ param (
 
 Push-Location $PSScriptRoot
 
-try {
-    Write-Host "Delete bin and obj " $deleteBinAndObj
+try {    
+    # Write-Output "Delete bin and obj " $deleteBinAndObj
     if ($deleteBinAndObj) {
-        Write-Host "Deleting BIN and OBJ"
-        .\del-bin-and-obj.ps1
-        Write-Host "Done deleting bin and obj"
+        Write-Output "Deleting ‘/bin’ and ‘/obj’..."
+        .\del-bin-and-obj.ps1 | Out-Null
+        Write-Output "Done."
     }
 
     Push-Location ..
     try {
-        Write-Host "Invoking ‘dotnet build’"
-        dotnet build -c release
+        Write-Output "Invoking ‘dotnet build’ for ‘PdfSharp.BuildConfig.csproj’"
+        # Generate semver infos and PDFsharp build configuration first.
+        dotnet build .\src\foundation\src\shared\src\PdfSharp.BuildConfig\PdfSharp.BuildConfig.csproj
+        Write-Output "Invoking ‘dotnet build’ for PDFsharp solution"
+        dotnet build --configuration release
         $build = $LASTEXITCODE
-        Write-Host "‘dotnet build’ has finished"
+        Write-Output "‘dotnet build’ has finished"
     }
     finally {
         Pop-Location
     }
 
     if ($build -gt 0) {
-        Write-Host "‘dotnet build’ failed with code " $build
+        Write-Error "‘dotnet build’ failed with code " $build
         throw "‘dotnet build’ failed with code " + $build
     }
 
-    .\update-local-nuget-packages-release.ps1
+     Write-Output "Invoking ‘update-local-nuget-packages-release.ps1’"
+     .\update-local-nuget-packages-release.ps1
 }
 finally {
     Pop-Location