Update to .NET 9

src/PicView.Avalonia.MacOS/PicView.Avalonia.MacOS.csproj

@@ -3,7 +3,7 @@
     <OutputType>WinExe</OutputType>
     <!--If you are willing to use Windows/MacOS native APIs you will need to create 3 projects.
     One for Windows with net7.0-windows TFM, one for MacOS with net7.0-macos and one with net7.0 TFM for Linux.-->
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <Nullable>enable</Nullable>
     <BuiltInComInteropSupport>true</BuiltInComInteropSupport>
     <ApplicationManifest>app.manifest</ApplicationManifest>

src/PicView.Avalonia.Win32/PicView.Avalonia.Win32.csproj

@@ -3,7 +3,7 @@
     <OutputType>WinExe</OutputType>
     <!--If you are willing to use Windows/MacOS native APIs you will need to create 3 projects.
     One for Windows with net7.0-windows TFM, one for MacOS with net7.0-macos and one with net7.0 TFM for Linux.-->
-    <TargetFramework>net8.0-windows10.0.22621.0</TargetFramework>
+    <TargetFramework>net9.0-windows10.0.22621.0</TargetFramework>
     <Nullable>enable</Nullable>
     <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>
     <ApplicationManifest>app.manifest</ApplicationManifest>

src/PicView.Avalonia/PicView.Avalonia.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <Nullable>enable</Nullable>
     <LangVersion>latest</LangVersion>
     <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>

src/PicView.Core/PicView.Core.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <PlatformTarget>x64</PlatformTarget>

src/PicView.MacOS/PicView.MacOS.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>

src/PicView.Tests/PicView.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
 

src/PicView.WPF/PicView.WPF.csproj

@@ -307,7 +307,7 @@
     <AssemblyVersion>2.3.1</AssemblyVersion>
     <EnableNETAnalyzers>true</EnableNETAnalyzers>
     <EnforceCodeStyleInBuild>True</EnforceCodeStyleInBuild>
-    <TargetFramework>net8.0-windows10.0.22621.0</TargetFramework>
+    <TargetFramework>net9.0-windows10.0.22621.0</TargetFramework>
     <Nullable>enable</Nullable>
     <PackageReadmeFile></PackageReadmeFile>
     <Description>Fast, free and customizable image viewer for Windows 10 and 11. </Description>

src/PicView.Windows/PicView.Windows.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0-windows10.0.22621.0</TargetFramework>
+    <TargetFramework>net9.0-windows10.0.22621.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <PlatformTarget>x64</PlatformTarget>

src/XamlAnimatedGif/XamlAnimatedGif.csproj

@@ -3,7 +3,7 @@
     <UseWPF>true</UseWPF>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>XamlAnimatedGif.snk</AssemblyOriginatorKeyFile>
-    <TargetFramework>net8.0-windows10.0.22621.0</TargetFramework>
+    <TargetFramework>net9.0-windows10.0.22621.0</TargetFramework>
   </PropertyGroup>
   <PropertyGroup Label="Package properties">
     <Title>XAML Animated GIF</Title>