Bluegrams · sensslen · Mar 5, 2026
diff --git a/PdfiumViewer.Demo/PdfiumViewer.Demo.csproj b/PdfiumViewer.Demo/PdfiumViewer.Demo.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFrameworks>net48;net6.0-windows</TargetFrameworks>
+    <TargetFrameworks>net48;net8.0-windows;net9.0-windows;net10.0-windows</TargetFrameworks>
     <UseWindowsForms>true</UseWindowsForms>
     <AssemblyTitle>PdfViewer.Demo</AssemblyTitle>
     <Company>Pieter van Ginkel</Company>
@@ -71,7 +71,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="bblanchon.PDFium.Win32">
-      <Version>122.0.6219</Version>
+      <Version>147.0.7713</Version>
     </PackageReference>
   </ItemGroup>
 </Project>
diff --git a/PdfiumViewer.Test/PdfiumViewer.Test.csproj b/PdfiumViewer.Test/PdfiumViewer.Test.csproj
@@ -1,17 +1,21 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net40</TargetFramework>
+    <TargetFrameworks>net462</TargetFrameworks>
     <AssemblyTitle>PdfiumViewer.Test</AssemblyTitle>
     <Product>PdfiumViewer.Test</Product>
     <Copyright>Copyright ©  2015</Copyright>
     <OutputPath>bin\$(Configuration)\</OutputPath>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="NUnit" Version="2.6.4" />
+    <PackageReference Include="NUnit" Version="4.5.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="6.1.0" />
   </ItemGroup>
   <ItemGroup>
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />
+	<PackageReference Include="bblanchon.PDFium.Win32">
+      <Version>147.0.7713</Version>
+	</PackageReference>
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\PdfiumViewer\PdfiumViewer.csproj" />

diff --git a/PdfiumViewer.WPFDemo/PdfiumViewer.WPFDemo.csproj b/PdfiumViewer.WPFDemo/PdfiumViewer.WPFDemo.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFrameworks>net48;net6.0-windows</TargetFrameworks>
+    <TargetFrameworks>net48;net8.0-windows;net9.0-windows;net10.0-windows</TargetFrameworks>
     <AssemblyTitle>PdfiumViewer.WPFDemo</AssemblyTitle>
     <Product>PdfiumViewer.WPFDemo</Product>
     <UseWPF>true</UseWPF>
@@ -52,7 +52,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="bblanchon.PDFium.Win32">
-      <Version>122.0.6219</Version>
+      <Version>147.0.7713</Version>
     </PackageReference>
   </ItemGroup>
 </Project>
diff --git a/PdfiumViewer/CustomScrollControl.cs b/PdfiumViewer/CustomScrollControl.cs
@@ -1,10 +1,8 @@
 using System;
-using System.Collections.Generic;
 using System.ComponentModel;
 using System.Drawing;
 using System.Runtime.InteropServices;
 using System.Security.Permissions;
-using System.Text;
 using System.Windows.Forms;
 
 #pragma warning disable 1591
@@ -349,8 +347,8 @@ private bool SetDisplayRectangleSize(int width, int height)
         {
             bool needLayout = false;
 
-            double hScale = _displayRect.Height==0 ? 1 :(double)width / _displayRect.Width;
-            double vScale = _displayRect.Height==0? 1 : (double)height / _displayRect.Height;
+            double hScale = _displayRect.Height == 0 ? 1 : (double)width / _displayRect.Width;
+            double vScale = _displayRect.Height == 0 ? 1 : (double)height / _displayRect.Height;
 
             if (_displayRect.Width != width || _displayRect.Height != height)
             {
@@ -625,7 +623,9 @@ private void WmOnScroll(ref System.Windows.Forms.Message m, int oldValue, int va
         }
 
         [EditorBrowsable(EditorBrowsableState.Advanced)]
+#if NETFRAMEWORK
         [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]
+#endif
         protected override void WndProc(ref System.Windows.Forms.Message m)
         {
             switch (m.Msg)

diff --git a/PdfiumViewer/IPdfDocument.cs b/PdfiumViewer/IPdfDocument.cs
@@ -3,7 +3,6 @@
 using System.Drawing;
 using System.Drawing.Printing;
 using System.IO;
-using System.Text;
 
 namespace PdfiumViewer
 {
@@ -260,6 +259,7 @@ public interface IPdfDocument : IDisposable
         /// <returns>The converted rectangle.</returns>
         Rectangle RectangleFromPdf(int page, RectangleF rect);
 
+        /// <summary>
         /// Get detailed information for all characters on the page.
         /// </summary>
         /// <param name="page">The page to get the information for.</param>

diff --git a/PdfiumViewer/NativeMethods.cs b/PdfiumViewer/NativeMethods.cs
@@ -1,13 +1,10 @@
-using System;
-using System.Collections.Generic;
+using Microsoft.Win32.SafeHandles;
+using System;
 using System.Drawing;
 using System.IO;
 using System.Runtime.ConstrainedExecution;
 using System.Runtime.InteropServices;
 using System.Security.Permissions;
-using System.Text;
-using System.Windows.Forms;
-using Microsoft.Win32.SafeHandles;
 
 namespace PdfiumViewer
 {
@@ -84,16 +81,20 @@ public enum FileMapAccess : uint
         [DllImport("user32.dll")]
         public static extern int ScrollWindowEx(IntPtr hWnd, int dx, int dy, IntPtr prcScroll, IntPtr prcClip, IntPtr hrgnUpdate, IntPtr prcUpdate, uint flags);
 
+#if NETFRAMEWORK
         [SecurityPermission(SecurityAction.InheritanceDemand, UnmanagedCode = true)]
         [SecurityPermission(SecurityAction.Demand, UnmanagedCode = true)]
+#endif
         public class MemoryMappedHandle : SafeHandleZeroOrMinusOneIsInvalid
         {
             public MemoryMappedHandle()
                 : base(true)
             {
             }
 
+#if NETFRAMEWORK
             [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
+#endif
             protected override bool ReleaseHandle()
             {
                 return CloseHandle(handle);

diff --git a/PdfiumViewer/PdfException.cs b/PdfiumViewer/PdfException.cs
@@ -1,7 +1,5 @@
 using System;
-using System.Collections.Generic;
 using System.Runtime.Serialization;
-using System.Text;
 
 #pragma warning disable 1591
 
@@ -52,9 +50,11 @@ public PdfException(string message, Exception innerException)
         {
         }
 
+#if NETFRAMEWORK
         protected PdfException(SerializationInfo info, StreamingContext context)
             : base(info, context)
         {
         }
+#endif
     }
 }
diff --git a/PdfiumViewer/PdfRenderer.cs b/PdfiumViewer/PdfRenderer.cs
@@ -61,6 +61,7 @@ public class PdfRenderer : PanningZoomingScrollControl
         /// <summary>
         /// Gets or sets the currently focused page.
         /// </summary>
+        [DefaultValue(1)]
         public int Page
         {
             get
@@ -120,6 +121,7 @@ public Rectangle GetOuterBounds(int page)
         /// <summary>
         /// Gets or sets the way the document should be zoomed initially.
         /// </summary>
+        [DefaultValue(PdfViewerZoomMode.FitHeight)]
         public PdfViewerZoomMode ZoomMode
         {
             get { return _zoomMode; }
@@ -147,6 +149,7 @@ public PdfViewerCursorMode CursorMode
         /// <summary>
         /// Gets or sets the current rotation of the PDF document.
         /// </summary>
+        [DefaultValue(PdfRotation.Rotate0)]
         public PdfRotation Rotation
         {
             get { return _rotation; }
@@ -843,7 +846,7 @@ protected override Rectangle GetDocumentBounds()
 
             int height = (int)(scaledHeight + (ShadeBorder.Size.Vertical + PageMargin.Vertical) * Document.PageCount);
             int width = (int)(_maxWidth * _scaleFactor + ShadeBorder.Size.Horizontal + PageMargin.Horizontal);
-            
+
             var center = new Point(
                 DisplayRectangle.Width / 2,
                 DisplayRectangle.Height / 2
@@ -852,7 +855,8 @@ protected override Rectangle GetDocumentBounds()
             if (
                 DisplayRectangle.Width > ClientSize.Width ||
                 DisplayRectangle.Height > ClientSize.Height
-            ) {
+            )
+            {
                 center.X += DisplayRectangle.Left;
                 center.Y += DisplayRectangle.Top;
             }

diff --git a/PdfiumViewer/PdfiumViewer.csproj b/PdfiumViewer/PdfiumViewer.csproj
@@ -3,12 +3,12 @@
     <OutputType>Library</OutputType>
     <Configuration Condition=" '$(Configuration)' == '' ">Release</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">x86</Platform>
-    <TargetFrameworks>net20;net45;netcoreapp3.1;net6.0-windows</TargetFrameworks>
+    <TargetFrameworks>net462;net8.0-windows;net9.0-windows;net10.0-windows</TargetFrameworks>
     <UseWindowsForms>true</UseWindowsForms>
     <AssemblyTitle>PdfViewer</AssemblyTitle>
     <Company>Pieter van Ginkel; Bluegrams</Company>
     <Product>PdfViewer</Product>
-    <Description>Updated fork of PdfiumViewer, PDF viewer based on PDFium, ported to .NET Core and .NET 6.</Description>
+    <Description>Updated fork of PdfiumViewer, PDF viewer based on PDFium, ported to .NET.</Description>
     <Copyright>Original © 2012-2015 Pieter van Ginkel</Copyright>
     <Version>2.14.5.0</Version>
     <Authors>Pieter van Ginkel, Bluegrams</Authors>
@@ -20,7 +20,7 @@
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>Key.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
-  <ItemGroup Condition=" '$(TargetFramework)' == 'net20' Or '$(TargetFramework)' == 'net45'">
+  <ItemGroup Condition="'$(TargetFramework)' == 'net462'">
     <Reference Include="System.Windows.Forms" />
   </ItemGroup>
   <ItemGroup>