diff --git a/src/Benchmarks/ReactiveUI.Benchmarks.csproj b/src/Benchmarks/ReactiveUI.Benchmarks.csproj
index 34ab2ff5fd..d35d3d4d7b 100644
--- a/src/Benchmarks/ReactiveUI.Benchmarks.csproj
+++ b/src/Benchmarks/ReactiveUI.Benchmarks.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <IsPackable>false</IsPackable>
-    <TargetFrameworks>net8.0</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIModernTargets)</TargetFrameworks>
     <PlatformTarget>AnyCPU</PlatformTarget>
     <OutputType>Exe</OutputType>
     <NoWarn>;1591;1701;1702;1705;CA1822</NoWarn>
diff --git a/src/Directory.Build.props b/src/Directory.Build.props
index 55743c15dd..bf5d3f3d49 100644
--- a/src/Directory.Build.props
+++ b/src/Directory.Build.props
@@ -32,9 +32,54 @@
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <IncludePackageReferencesDuringMarkupCompilation>true</IncludePackageReferencesDuringMarkupCompilation>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
+    <!-- Legacy properties maintained for compatibility -->
     <WindowsTargetFrameworks>net462;net472;net8.0-windows10.0.17763.0;net9.0-windows10.0.17763.0;net8.0-windows10.0.19041.0;net9.0-windows10.0.19041.0</WindowsTargetFrameworks>
     <MobileTargetFrameworks>net8.0-android;net8.0-ios;net8.0-tvos;net8.0-macos;net8.0-maccatalyst;net9.0-android;net9.0-ios;net9.0-tvos;net9.0-macos;net9.0-maccatalyst</MobileTargetFrameworks>
     <BaseTargetFrameworks>netstandard2.0;net8.0;net9.0</BaseTargetFrameworks>
+    
+    <!-- Granular Target Framework definitions for cross-platform builds -->
+    <ReactiveUICoreTargets>netstandard2.0;net8.0;net9.0</ReactiveUICoreTargets>
+    <ReactiveUIAndroidTargets>net9.0-android</ReactiveUIAndroidTargets>
+    
+    <!-- Platform-specific targets - always defined but only used on supported platforms -->
+    <ReactiveUIFrameworkTargets>net462;net472</ReactiveUIFrameworkTargets>
+    <ReactiveUIWindowsTargets>net8.0-windows10.0.17763.0;net9.0-windows10.0.17763.0;net8.0-windows10.0.19041.0;net9.0-windows10.0.19041.0</ReactiveUIWindowsTargets>
+    <ReactiveUIWinUITargets>net8.0-windows10.0.19041.0;net9.0-windows10.0.19041.0</ReactiveUIWinUITargets>
+    <ReactiveUIAppleTargets>net9.0-ios;net9.0-tvos;net9.0-macos;net9.0-maccatalyst</ReactiveUIAppleTargets>
+    
+    <!-- Windows-only targets (combines Framework + Windows targets) - conditioned -->
+    <ReactiveUIWindowsOnlyTargets Condition="'$(IsWindows)' == 'true'">$(ReactiveUIFrameworkTargets);$(ReactiveUIWindowsTargets)</ReactiveUIWindowsOnlyTargets>
+    <ReactiveUIWindowsOnlyTargets Condition="'$(IsWindows)' != 'true'">$(ReactiveUIWindowsTargets)</ReactiveUIWindowsOnlyTargets>
+    
+    <!-- Cross-platform platform detection properties for project-level conditional building -->
+    <IsWindows>$([MSBuild]::IsOsPlatform('Windows'))</IsWindows>
+    <IsMacOS>$([MSBuild]::IsOsPlatform('OSX'))</IsMacOS>
+    <IsLinux>$([MSBuild]::IsOsPlatform('Linux'))</IsLinux>
+    
+    <!-- Modern targets for tests and benchmarks (no netstandard) -->
+    <ReactiveUIModernTargets>net8.0;net9.0</ReactiveUIModernTargets>
+    
+    <!-- Enable building Windows-specific targets on non-Windows platforms -->
+    <EnableWindowsTargeting>true</EnableWindowsTargeting>
+  </PropertyGroup>
+  
+  <!-- Build final target framework list based on operating system -->
+  <PropertyGroup>
+    <!-- Start with core targets available on all platforms -->
+    <ReactiveUIFinalTargetFrameworks>$(ReactiveUICoreTargets)</ReactiveUIFinalTargetFrameworks>
+    
+    <!-- Add Android targets (available on all platforms with Android SDK) -->
+    <ReactiveUIFinalTargetFrameworks>$(ReactiveUIFinalTargetFrameworks);$(ReactiveUIAndroidTargets)</ReactiveUIFinalTargetFrameworks>
+    
+    <!-- Add Windows-specific targets (.NET Framework and Windows-specific TFMs) on Windows -->
+    <ReactiveUIFinalTargetFrameworks Condition="$([MSBuild]::IsOsPlatform('Windows'))">$(ReactiveUIFinalTargetFrameworks);$(ReactiveUIFrameworkTargets);$(ReactiveUIWindowsTargets)</ReactiveUIFinalTargetFrameworks>
+    
+    <!-- Add Apple targets on macOS and Windows -->
+    <ReactiveUIFinalTargetFrameworks Condition="$([MSBuild]::IsOsPlatform('Windows')) or $([MSBuild]::IsOsPlatform('OSX'))">$(ReactiveUIFinalTargetFrameworks);$(ReactiveUIAppleTargets)</ReactiveUIFinalTargetFrameworks>
+    
+    <!-- Final target frameworks for tests/benchmarks (modern .NET only, with platform-specific additions) -->
+    <ReactiveUIFinalModernTargetFrameworks>$(ReactiveUIModernTargets)</ReactiveUIFinalModernTargetFrameworks>
+    <ReactiveUIFinalModernTargetFrameworks Condition="$([MSBuild]::IsOsPlatform('Windows'))">$(ReactiveUIFinalModernTargetFrameworks);net472;$(ReactiveUIWindowsTargets)</ReactiveUIFinalModernTargetFrameworks>
     <!-- Ensure all test runs use our runsettings to control cross-assembly parallelism -->
     <RunSettingsFilePath>$(MSBuildThisFileDirectory)tests.runsettings</RunSettingsFilePath>
   </PropertyGroup>  
diff --git a/src/ReactiveUI.AndroidX/ReactiveUI.AndroidX.csproj b/src/ReactiveUI.AndroidX/ReactiveUI.AndroidX.csproj
index 4b4ab206b6..a7b7a097b7 100644
--- a/src/ReactiveUI.AndroidX/ReactiveUI.AndroidX.csproj
+++ b/src/ReactiveUI.AndroidX/ReactiveUI.AndroidX.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net8.0-android</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIAndroidTargets)</TargetFrameworks>
     <PackageDescription>Provides ReactiveUI extensions for the AndroidX Library</PackageDescription>
     <PackageId>ReactiveUI.AndroidX</PackageId>
     <PackageTags>mvvm;reactiveui;rx;reactive extensions;observable;LINQ;events;frp;xamarin;androidx;forms;xamarin.androidx;net;</PackageTags>
diff --git a/src/ReactiveUI.Blazor/ReactiveUI.Blazor.csproj b/src/ReactiveUI.Blazor/ReactiveUI.Blazor.csproj
index caf115df05..d3b6be7a5a 100644
--- a/src/ReactiveUI.Blazor/ReactiveUI.Blazor.csproj
+++ b/src/ReactiveUI.Blazor/ReactiveUI.Blazor.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(BaseTargetFrameworks)</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUICoreTargets)</TargetFrameworks>
     <PackageDescription>Contains the ReactiveUI platform specific extensions for Blazor</PackageDescription>
     <PackageTags>mvvm;reactiveui;rx;reactive extensions;observable;LINQ;eventsnet;netstandard;blazor;web;</PackageTags>
     <NoWarn>$(NoWarn);BL0007;</NoWarn>
diff --git a/src/ReactiveUI.Blend/ReactiveUI.Blend.csproj b/src/ReactiveUI.Blend/ReactiveUI.Blend.csproj
index e1f61abf68..aab9c08aad 100644
--- a/src/ReactiveUI.Blend/ReactiveUI.Blend.csproj
+++ b/src/ReactiveUI.Blend/ReactiveUI.Blend.csproj
@@ -1,6 +1,6 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk" Condition="'$(IsWindows)' == 'true'">
   <PropertyGroup>
-    <TargetFrameworks>$(WindowsTargetFrameworks)</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIWindowsOnlyTargets)</TargetFrameworks>
     <AssemblyName>ReactiveUI.Blend</AssemblyName>
     <RootNamespace>ReactiveUI.Blend</RootNamespace>
     <PackageDescription>Provides reactive extensions based xaml components based on the Blend SDK library, allowing you to fire a observable from XAML</PackageDescription>
diff --git a/src/ReactiveUI.Builder.Maui.Tests/ReactiveUI.Builder.Maui.Tests.csproj b/src/ReactiveUI.Builder.Maui.Tests/ReactiveUI.Builder.Maui.Tests.csproj
index dd68222cf5..b2866edc7a 100644
--- a/src/ReactiveUI.Builder.Maui.Tests/ReactiveUI.Builder.Maui.Tests.csproj
+++ b/src/ReactiveUI.Builder.Maui.Tests/ReactiveUI.Builder.Maui.Tests.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net9.0;net8.0-windows10.0.19041.0;net9.0-windows10.0.19041.0</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIFinalModernTargetFrameworks)</TargetFrameworks>
     <UseMaui>true</UseMaui>
     <NoWarn>$(NoWarn);CS1591;SA1600</NoWarn>
     <IsPackable>false</IsPackable>
diff --git a/src/ReactiveUI.Builder.Tests/ReactiveUI.Builder.Tests.csproj b/src/ReactiveUI.Builder.Tests/ReactiveUI.Builder.Tests.csproj
index 0d6b813e8a..6b522f5ac4 100644
--- a/src/ReactiveUI.Builder.Tests/ReactiveUI.Builder.Tests.csproj
+++ b/src/ReactiveUI.Builder.Tests/ReactiveUI.Builder.Tests.csproj
@@ -1,8 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
-    <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">net8.0-windows10.0.17763.0;net9.0-windows10.0.17763.0</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIFinalModernTargetFrameworks)</TargetFrameworks>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
diff --git a/src/ReactiveUI.Builder.WpfApp/ReactiveUI.Builder.WpfApp.csproj b/src/ReactiveUI.Builder.WpfApp/ReactiveUI.Builder.WpfApp.csproj
index c755cf7194..102ed1078c 100644
--- a/src/ReactiveUI.Builder.WpfApp/ReactiveUI.Builder.WpfApp.csproj
+++ b/src/ReactiveUI.Builder.WpfApp/ReactiveUI.Builder.WpfApp.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk" Condition="'$(IsWindows)' == 'true'">
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
diff --git a/src/ReactiveUI.Drawing/ReactiveUI.Drawing.csproj b/src/ReactiveUI.Drawing/ReactiveUI.Drawing.csproj
index 416fa50350..0f53b0190d 100644
--- a/src/ReactiveUI.Drawing/ReactiveUI.Drawing.csproj
+++ b/src/ReactiveUI.Drawing/ReactiveUI.Drawing.csproj
@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;$(MobileTargetFrameworks)</TargetFrameworks>
-    <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">$(TargetFrameworks);$(WindowsTargetFrameworks)</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIFinalTargetFrameworks)</TargetFrameworks>
     <AssemblyName>ReactiveUI.Drawing</AssemblyName>
     <RootNamespace>ReactiveUI.Drawing</RootNamespace>
     <PackageDescription>A extension to the ReactiveUI platform that provides Splat bitmap operation support.</PackageDescription>
diff --git a/src/ReactiveUI.Drawing/Registrations.cs b/src/ReactiveUI.Drawing/Registrations.cs
index 15048f0112..3ec9a8e87a 100644
--- a/src/ReactiveUI.Drawing/Registrations.cs
+++ b/src/ReactiveUI.Drawing/Registrations.cs
@@ -27,7 +27,7 @@ public void Register(Action<Func<object>, Type> registerFunction)
             throw new ArgumentNullException(nameof(registerFunction));
         }
 
-#if !NETSTANDARD && !NETCOREAPP2_0
+#if NETFRAMEWORK || (NET5_0_OR_GREATER && WINDOWS)
         registerFunction(() => new PlatformBitmapLoader(), typeof(IBitmapLoader));
 #endif
     }
diff --git a/src/ReactiveUI.LeakTests/ReactiveUI.LeakTests.csproj b/src/ReactiveUI.LeakTests/ReactiveUI.LeakTests.csproj
index 672316b150..8ba16002b7 100644
--- a/src/ReactiveUI.LeakTests/ReactiveUI.LeakTests.csproj
+++ b/src/ReactiveUI.LeakTests/ReactiveUI.LeakTests.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net472;net9.0</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIFinalModernTargetFrameworks)</TargetFrameworks>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
   <ItemGroup>
diff --git a/src/ReactiveUI.Maui/ReactiveUI.Maui.csproj b/src/ReactiveUI.Maui/ReactiveUI.Maui.csproj
index 76bb6cc9fc..b9f8a0a9af 100644
--- a/src/ReactiveUI.Maui/ReactiveUI.Maui.csproj
+++ b/src/ReactiveUI.Maui/ReactiveUI.Maui.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
-    <TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net8.0-windows10.0.19041.0;net9.0-windows10.0.19041.0</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIModernTargets)</TargetFrameworks>
+    <TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);$(ReactiveUIWinUITargets)</TargetFrameworks>
     <PackageDescription>Contains the ReactiveUI platform specific extensions for Microsoft Maui</PackageDescription>
     <PackageTags>mvvm;reactiveui;rx;reactive extensions;observable;LINQ;events;frp;maui;android;ios;mac;windows;net</PackageTags>
     <UseMaui>true</UseMaui>
diff --git a/src/ReactiveUI.Splat.Tests/ReactiveUI.Splat.Tests.csproj b/src/ReactiveUI.Splat.Tests/ReactiveUI.Splat.Tests.csproj
index 508873a39d..4dbc2d51b0 100644
--- a/src/ReactiveUI.Splat.Tests/ReactiveUI.Splat.Tests.csproj
+++ b/src/ReactiveUI.Splat.Tests/ReactiveUI.Splat.Tests.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net472;net9.0</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIFinalModernTargetFrameworks)</TargetFrameworks>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
   <ItemGroup>
diff --git a/src/ReactiveUI.Testing.Tests/ReactiveUI.Testing.Tests.csproj b/src/ReactiveUI.Testing.Tests/ReactiveUI.Testing.Tests.csproj
index 6f661e469d..a087c85bbe 100644
--- a/src/ReactiveUI.Testing.Tests/ReactiveUI.Testing.Tests.csproj
+++ b/src/ReactiveUI.Testing.Tests/ReactiveUI.Testing.Tests.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net472;net9.0</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIFinalModernTargetFrameworks)</TargetFrameworks>
     <FodyTargetFramework>netstandard2.0</FodyTargetFramework>
     <FodyTargetFramework Condition=" $(TargetFramework.StartsWith('net4')) ">$(TargetFramework)</FodyTargetFramework>
   </PropertyGroup>
diff --git a/src/ReactiveUI.Testing/ReactiveUI.Testing.csproj b/src/ReactiveUI.Testing/ReactiveUI.Testing.csproj
index 44af03c19b..a5425a0495 100644
--- a/src/ReactiveUI.Testing/ReactiveUI.Testing.csproj
+++ b/src/ReactiveUI.Testing/ReactiveUI.Testing.csproj
@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(BaseTargetFrameworks)</TargetFrameworks>
-    <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">$(TargetFrameworks);net472</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIFinalModernTargetFrameworks)</TargetFrameworks>
     <AssemblyName>ReactiveUI.Testing</AssemblyName>
     <RootNamespace>ReactiveUI.Testing</RootNamespace>
     <PackageDescription>Provides extensions for testing ReactiveUI based applications</PackageDescription>
diff --git a/src/ReactiveUI.Tests/ReactiveUI.Tests.csproj b/src/ReactiveUI.Tests/ReactiveUI.Tests.csproj
index 915ea7afdc..ac56c8548e 100644
--- a/src/ReactiveUI.Tests/ReactiveUI.Tests.csproj
+++ b/src/ReactiveUI.Tests/ReactiveUI.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
-    <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">net472;net8.0-windows10.0.17763.0;net9.0-windows10.0.17763.0</TargetFrameworks>
+    <TargetFrameworks Condition="'$(IsWindows)' == 'true'">$(ReactiveUIFinalModernTargetFrameworks)</TargetFrameworks>
+    <TargetFrameworks Condition="'$(IsWindows)' != 'true'"></TargetFrameworks>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
   </PropertyGroup>
   <ItemGroup>
diff --git a/src/ReactiveUI.WinUI/ReactiveUI.WinUI.csproj b/src/ReactiveUI.WinUI/ReactiveUI.WinUI.csproj
index f63c0c7da3..a6a7653043 100644
--- a/src/ReactiveUI.WinUI/ReactiveUI.WinUI.csproj
+++ b/src/ReactiveUI.WinUI/ReactiveUI.WinUI.csproj
@@ -1,6 +1,6 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk" Condition="'$(IsWindows)' == 'true'">
   <PropertyGroup>
-    <TargetFrameworks>net8.0-windows10.0.19041.0;net9.0-windows10.0.19041.0</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIWinUITargets)</TargetFrameworks>
     <TargetPlatformMinVersion>10.0.19041.0</TargetPlatformMinVersion>
     <PackageDescription>Contains the ReactiveUI platform specific extensions for WinUI Desktop</PackageDescription>
     <RootNamespace>ReactiveUI.WinUI.Desktop</RootNamespace>
diff --git a/src/ReactiveUI.Winforms/ReactiveUI.Winforms.csproj b/src/ReactiveUI.Winforms/ReactiveUI.Winforms.csproj
index 7ade4470e4..b32e5bb132 100644
--- a/src/ReactiveUI.Winforms/ReactiveUI.Winforms.csproj
+++ b/src/ReactiveUI.Winforms/ReactiveUI.Winforms.csproj
@@ -1,10 +1,10 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk" Condition="'$(IsWindows)' == 'true'">
   <!--
     Added 19041 target as a workaround for System.Reactive targeting net5.0-windows10.0.19041.0
     When 19041 is selected by the end user it causes the ControlScheduler in System.Reactive to be exposed and used.
     -->
   <PropertyGroup>
-    <TargetFrameworks>$(WindowsTargetFrameworks)</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIWindowsOnlyTargets)</TargetFrameworks>
     <AssemblyName>ReactiveUI.Winforms</AssemblyName>
     <RootNamespace>ReactiveUI.Winforms</RootNamespace>
     <PackageDescription>Contains the ReactiveUI platform specific extensions for Windows Forms</PackageDescription>
diff --git a/src/ReactiveUI.Wpf/ReactiveUI.Wpf.csproj b/src/ReactiveUI.Wpf/ReactiveUI.Wpf.csproj
index a155a4a2ff..6eaa76251d 100644
--- a/src/ReactiveUI.Wpf/ReactiveUI.Wpf.csproj
+++ b/src/ReactiveUI.Wpf/ReactiveUI.Wpf.csproj
@@ -1,10 +1,10 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk" Condition="'$(IsWindows)' == 'true'">
   <PropertyGroup>
     <!--
     Added 19041 target as a workaround for System.Reactive targeting net5.0-windows10.0.19041.0
     When 19041 is selected by the end user it causes the DispatcherScheduler in System.Reactive to be exposed and used.
     -->
-    <TargetFrameworks>$(WindowsTargetFrameworks)</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIWindowsOnlyTargets)</TargetFrameworks>
     <PackageDescription>Contains the ReactiveUI platform specific extensions for Windows Presentation Foundation (WPF)</PackageDescription>
     <PackageId>ReactiveUI.WPF</PackageId>
     <UseWpf>true</UseWpf>
diff --git a/src/ReactiveUI/ReactiveUI.csproj b/src/ReactiveUI/ReactiveUI.csproj
index 1f1aabdfa9..a771d806db 100644
--- a/src/ReactiveUI/ReactiveUI.csproj
+++ b/src/ReactiveUI/ReactiveUI.csproj
@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(BaseTargetFrameworks);$(MobileTargetFrameworks)</TargetFrameworks>
-    <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">$(TargetFrameworks);$(WindowsTargetFrameworks)</TargetFrameworks>
+    <TargetFrameworks>$(ReactiveUIFinalTargetFrameworks)</TargetFrameworks>
     <AssemblyName>ReactiveUI</AssemblyName>
     <RootNamespace>ReactiveUI</RootNamespace>
     <PackageDescription>A MVVM framework that integrates with the Reactive Extensions for .NET to create elegant, testable User Interfaces that run on any mobile or desktop platform. This is the base package with the base platform implementations</PackageDescription>