From 691f93a1ed0073475b2fa396eb9d9f72e6288038 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Fri, 10 Dec 2021 12:57:59 +0100
Subject: [PATCH] Multi-target net6.0.

---
 packages/Avalonia/Avalonia.csproj                             | 2 +-
 src/Avalonia.Animation/Avalonia.Animation.csproj              | 2 +-
 src/Avalonia.Base/Avalonia.Base.csproj                        | 2 +-
 .../Avalonia.Controls.DataGrid.csproj                         | 4 ++--
 src/Avalonia.Controls/Avalonia.Controls.csproj                | 2 +-
 src/Avalonia.DesignerSupport/Avalonia.DesignerSupport.csproj  | 4 ++--
 src/Avalonia.Desktop/Avalonia.Desktop.csproj                  | 2 +-
 src/Avalonia.DesktopRuntime/Avalonia.DesktopRuntime.csproj    | 2 +-
 src/Avalonia.Diagnostics/Avalonia.Diagnostics.csproj          | 2 +-
 src/Avalonia.Dialogs/Avalonia.Dialogs.csproj                  | 2 +-
 src/Avalonia.FreeDesktop/Avalonia.FreeDesktop.csproj          | 2 +-
 src/Avalonia.Headless.Vnc/Avalonia.Headless.Vnc.csproj        | 2 +-
 src/Avalonia.Headless/Avalonia.Headless.csproj                | 2 +-
 src/Avalonia.Input/Avalonia.Input.csproj                      | 2 +-
 src/Avalonia.Interactivity/Avalonia.Interactivity.csproj      | 2 +-
 src/Avalonia.Layout/Avalonia.Layout.csproj                    | 2 +-
 src/Avalonia.Native/Avalonia.Native.csproj                    | 2 +-
 src/Avalonia.OpenGL/Avalonia.OpenGL.csproj                    | 4 ++--
 src/Avalonia.ReactiveUI/Avalonia.ReactiveUI.csproj            | 2 +-
 src/Avalonia.Remote.Protocol/Avalonia.Remote.Protocol.csproj  | 2 +-
 src/Avalonia.Styling/Avalonia.Styling.csproj                  | 2 +-
 src/Avalonia.Themes.Default/Avalonia.Themes.Default.csproj    | 2 +-
 src/Avalonia.Themes.Fluent/Avalonia.Themes.Fluent.csproj      | 2 +-
 src/Avalonia.Visuals/Avalonia.Visuals.csproj                  | 2 +-
 src/Avalonia.X11/Avalonia.X11.csproj                          | 2 +-
 .../Avalonia.LinuxFramebuffer.csproj                          | 2 +-
 .../Avalonia.Markup.Xaml.Loader.csproj                        | 2 +-
 src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj   | 2 +-
 src/Markup/Avalonia.Markup/Avalonia.Markup.csproj             | 2 +-
 src/Skia/Avalonia.Skia/Avalonia.Skia.csproj                   | 2 +-
 src/Windows/Avalonia.Direct2D1/Avalonia.Direct2D1.csproj      | 2 +-
 src/Windows/Avalonia.Win32/Avalonia.Win32.csproj              | 2 +-
 32 files changed, 35 insertions(+), 35 deletions(-)

diff --git a/packages/Avalonia/Avalonia.csproj b/packages/Avalonia/Avalonia.csproj
index 44e2290a0d..af9ed71c5f 100644
--- a/packages/Avalonia/Avalonia.csproj
+++ b/packages/Avalonia/Avalonia.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-      <TargetFrameworks>netstandard2.0;net461;netcoreapp2.0</TargetFrameworks>
+      <TargetFrameworks>netstandard2.0;net461;netcoreapp2.0;net6.0</TargetFrameworks>
       <PackageId>Avalonia</PackageId>
   </PropertyGroup>
 
diff --git a/src/Avalonia.Animation/Avalonia.Animation.csproj b/src/Avalonia.Animation/Avalonia.Animation.csproj
index ee91acf45e..85938ad958 100644
--- a/src/Avalonia.Animation/Avalonia.Animation.csproj
+++ b/src/Avalonia.Animation/Avalonia.Animation.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>    
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\Avalonia.Base\Avalonia.Base.csproj" />
diff --git a/src/Avalonia.Base/Avalonia.Base.csproj b/src/Avalonia.Base/Avalonia.Base.csproj
index 0470dbfe89..e872756a58 100644
--- a/src/Avalonia.Base/Avalonia.Base.csproj
+++ b/src/Avalonia.Base/Avalonia.Base.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <AssemblyName>Avalonia.Base</AssemblyName>
     <RootNamespace>Avalonia</RootNamespace>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>    
diff --git a/src/Avalonia.Controls.DataGrid/Avalonia.Controls.DataGrid.csproj b/src/Avalonia.Controls.DataGrid/Avalonia.Controls.DataGrid.csproj
index 6975642db2..d50e8b1115 100644
--- a/src/Avalonia.Controls.DataGrid/Avalonia.Controls.DataGrid.csproj
+++ b/src/Avalonia.Controls.DataGrid/Avalonia.Controls.DataGrid.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <PackageId>Avalonia.Controls.DataGrid</PackageId>
   </PropertyGroup>
   <ItemGroup>
@@ -16,7 +16,7 @@
     <ProjectReference Include="..\Markup\Avalonia.Markup\Avalonia.Markup.csproj" />    
     <ProjectReference Include="..\Avalonia.Controls\Avalonia.Controls.csproj" />
     <!-- Compatibility with old apps -->
-    <EmbeddedResource Include="Themes\**\*.xaml"/>
+    <EmbeddedResource Include="Themes\**\*.xaml" />
   </ItemGroup>
   <Import Project="..\..\build\Rx.props" />
   <Import Project="..\..\build\EmbedXaml.props" />
diff --git a/src/Avalonia.Controls/Avalonia.Controls.csproj b/src/Avalonia.Controls/Avalonia.Controls.csproj
index 7f1f4bc8f3..479bbb49b6 100644
--- a/src/Avalonia.Controls/Avalonia.Controls.csproj
+++ b/src/Avalonia.Controls/Avalonia.Controls.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>    
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="..\Avalonia.Base\Metadata\NullableAttributes.cs" Link="NullableAttributes.cs" />
diff --git a/src/Avalonia.DesignerSupport/Avalonia.DesignerSupport.csproj b/src/Avalonia.DesignerSupport/Avalonia.DesignerSupport.csproj
index 35bd0f97e1..9d8842f613 100644
--- a/src/Avalonia.DesignerSupport/Avalonia.DesignerSupport.csproj
+++ b/src/Avalonia.DesignerSupport/Avalonia.DesignerSupport.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <!-- WARNING! The designer support version number needs to be frozen 
          To allow projects that implement designer functionality to still
          work with newer versions of Avalonia. This version number only
@@ -13,7 +13,7 @@
   </PropertyGroup>
   <ItemGroup>
     <EmbeddedResource Include="Remote\HtmlTransport\webapp\build\**\*.gz" />
-    <EmbeddedResource Condition="'$(Configuration)' == 'Debug'" Remove="Remote\HtmlTransport\webapp\build\**\*.map.gz"/>
+    <EmbeddedResource Condition="'$(Configuration)' == 'Debug'" Remove="Remote\HtmlTransport\webapp\build\**\*.map.gz" />
     <ProjectReference Include="..\Markup\Avalonia.Markup.Xaml\Avalonia.Markup.Xaml.csproj" />
     <ProjectReference Include="..\Markup\Avalonia.Markup\Avalonia.Markup.csproj" />
     <ProjectReference Include="..\Avalonia.Animation\Avalonia.Animation.csproj" />
diff --git a/src/Avalonia.Desktop/Avalonia.Desktop.csproj b/src/Avalonia.Desktop/Avalonia.Desktop.csproj
index a9589b7f2b..114e6d7abd 100644
--- a/src/Avalonia.Desktop/Avalonia.Desktop.csproj
+++ b/src/Avalonia.Desktop/Avalonia.Desktop.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-      <TargetFramework>netstandard2.0</TargetFramework>
+      <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
       <PackageId>Avalonia.Desktop</PackageId>
   </PropertyGroup>
 
diff --git a/src/Avalonia.DesktopRuntime/Avalonia.DesktopRuntime.csproj b/src/Avalonia.DesktopRuntime/Avalonia.DesktopRuntime.csproj
index 805aae2d1a..29a8e05cfa 100644
--- a/src/Avalonia.DesktopRuntime/Avalonia.DesktopRuntime.csproj
+++ b/src/Avalonia.DesktopRuntime/Avalonia.DesktopRuntime.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp2.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/Avalonia.Diagnostics/Avalonia.Diagnostics.csproj b/src/Avalonia.Diagnostics/Avalonia.Diagnostics.csproj
index 35de491668..7d64e3d82f 100644
--- a/src/Avalonia.Diagnostics/Avalonia.Diagnostics.csproj
+++ b/src/Avalonia.Diagnostics/Avalonia.Diagnostics.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <RootNamespace>Avalonia</RootNamespace>
     <PackageId>Avalonia.Diagnostics</PackageId>
     <Nullable>enable</Nullable>
diff --git a/src/Avalonia.Dialogs/Avalonia.Dialogs.csproj b/src/Avalonia.Dialogs/Avalonia.Dialogs.csproj
index 665693a654..a1d249b8f7 100644
--- a/src/Avalonia.Dialogs/Avalonia.Dialogs.csproj
+++ b/src/Avalonia.Dialogs/Avalonia.Dialogs.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/Avalonia.FreeDesktop/Avalonia.FreeDesktop.csproj b/src/Avalonia.FreeDesktop/Avalonia.FreeDesktop.csproj
index 81af76dc20..897e7bf64d 100644
--- a/src/Avalonia.FreeDesktop/Avalonia.FreeDesktop.csproj
+++ b/src/Avalonia.FreeDesktop/Avalonia.FreeDesktop.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>    
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/Avalonia.Headless.Vnc/Avalonia.Headless.Vnc.csproj b/src/Avalonia.Headless.Vnc/Avalonia.Headless.Vnc.csproj
index 4aac862ae8..be91d5f056 100644
--- a/src/Avalonia.Headless.Vnc/Avalonia.Headless.Vnc.csproj
+++ b/src/Avalonia.Headless.Vnc/Avalonia.Headless.Vnc.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>netstandard2.0</TargetFramework>
+      <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     </PropertyGroup>
 
     <ItemGroup>
diff --git a/src/Avalonia.Headless/Avalonia.Headless.csproj b/src/Avalonia.Headless/Avalonia.Headless.csproj
index ac591b68a8..28666efdf2 100644
--- a/src/Avalonia.Headless/Avalonia.Headless.csproj
+++ b/src/Avalonia.Headless/Avalonia.Headless.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
 
   </PropertyGroup>
   <ItemGroup>
diff --git a/src/Avalonia.Input/Avalonia.Input.csproj b/src/Avalonia.Input/Avalonia.Input.csproj
index cc487e285b..8b33fdcc02 100644
--- a/src/Avalonia.Input/Avalonia.Input.csproj
+++ b/src/Avalonia.Input/Avalonia.Input.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <Nullable>Enable</Nullable>
   </PropertyGroup>
   <ItemGroup>
diff --git a/src/Avalonia.Interactivity/Avalonia.Interactivity.csproj b/src/Avalonia.Interactivity/Avalonia.Interactivity.csproj
index 2da23410d6..341b7bff78 100644
--- a/src/Avalonia.Interactivity/Avalonia.Interactivity.csproj
+++ b/src/Avalonia.Interactivity/Avalonia.Interactivity.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <Nullable>Enable</Nullable>
     <WarningsAsErrors>CS8600;CS8602;CS8603</WarningsAsErrors>
   </PropertyGroup>
diff --git a/src/Avalonia.Layout/Avalonia.Layout.csproj b/src/Avalonia.Layout/Avalonia.Layout.csproj
index 076ec56cd6..2842ccf3a8 100644
--- a/src/Avalonia.Layout/Avalonia.Layout.csproj
+++ b/src/Avalonia.Layout/Avalonia.Layout.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\Avalonia.Animation\Avalonia.Animation.csproj" />
diff --git a/src/Avalonia.Native/Avalonia.Native.csproj b/src/Avalonia.Native/Avalonia.Native.csproj
index 3913484431..c37bef0488 100644
--- a/src/Avalonia.Native/Avalonia.Native.csproj
+++ b/src/Avalonia.Native/Avalonia.Native.csproj
@@ -4,7 +4,7 @@
     <PackAvaloniaNative Condition="'$(PackAvaloniaNative)' == ''">$([MSBuild]::IsOSPlatform(OSX))</PackAvaloniaNative>
     <IsPackable>$(PackAvaloniaNative)</IsPackable>
     <IsPackable Condition="'$([MSBuild]::IsOSPlatform(OSX))' == 'True'">true</IsPackable>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 
diff --git a/src/Avalonia.OpenGL/Avalonia.OpenGL.csproj b/src/Avalonia.OpenGL/Avalonia.OpenGL.csproj
index d761e60c07..5649d46102 100644
--- a/src/Avalonia.OpenGL/Avalonia.OpenGL.csproj
+++ b/src/Avalonia.OpenGL/Avalonia.OpenGL.csproj
@@ -1,7 +1,7 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>netstandard2.0</TargetFramework>
+        <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
         <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     </PropertyGroup>
 
diff --git a/src/Avalonia.ReactiveUI/Avalonia.ReactiveUI.csproj b/src/Avalonia.ReactiveUI/Avalonia.ReactiveUI.csproj
index 2792ae1c91..a5f4b8073a 100644
--- a/src/Avalonia.ReactiveUI/Avalonia.ReactiveUI.csproj
+++ b/src/Avalonia.ReactiveUI/Avalonia.ReactiveUI.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <PackageId>Avalonia.ReactiveUI</PackageId>
     <SignAssembly>false</SignAssembly>
     <Nullable>enable</Nullable>
diff --git a/src/Avalonia.Remote.Protocol/Avalonia.Remote.Protocol.csproj b/src/Avalonia.Remote.Protocol/Avalonia.Remote.Protocol.csproj
index 6c241bbc75..3be0a688ab 100644
--- a/src/Avalonia.Remote.Protocol/Avalonia.Remote.Protocol.csproj
+++ b/src/Avalonia.Remote.Protocol/Avalonia.Remote.Protocol.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <DefineConstants>AVALONIA_REMOTE_PROTOCOL;$(DefineConstants)</DefineConstants>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>Key.snk</AssemblyOriginatorKeyFile>
diff --git a/src/Avalonia.Styling/Avalonia.Styling.csproj b/src/Avalonia.Styling/Avalonia.Styling.csproj
index d9f0cef3da..20b3183b00 100644
--- a/src/Avalonia.Styling/Avalonia.Styling.csproj
+++ b/src/Avalonia.Styling/Avalonia.Styling.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <AssemblyName>Avalonia.Styling</AssemblyName>
     <RootNamespace>Avalonia</RootNamespace>
   </PropertyGroup>
diff --git a/src/Avalonia.Themes.Default/Avalonia.Themes.Default.csproj b/src/Avalonia.Themes.Default/Avalonia.Themes.Default.csproj
index 06859e0cbb..d132dc4f5d 100644
--- a/src/Avalonia.Themes.Default/Avalonia.Themes.Default.csproj
+++ b/src/Avalonia.Themes.Default/Avalonia.Themes.Default.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\Markup\Avalonia.Markup.Xaml\Avalonia.Markup.Xaml.csproj" />
diff --git a/src/Avalonia.Themes.Fluent/Avalonia.Themes.Fluent.csproj b/src/Avalonia.Themes.Fluent/Avalonia.Themes.Fluent.csproj
index d0bc8e9d26..f339700b54 100644
--- a/src/Avalonia.Themes.Fluent/Avalonia.Themes.Fluent.csproj
+++ b/src/Avalonia.Themes.Fluent/Avalonia.Themes.Fluent.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\Markup\Avalonia.Markup.Xaml\Avalonia.Markup.Xaml.csproj" />
diff --git a/src/Avalonia.Visuals/Avalonia.Visuals.csproj b/src/Avalonia.Visuals/Avalonia.Visuals.csproj
index 802a120e03..51ebfcb11f 100644
--- a/src/Avalonia.Visuals/Avalonia.Visuals.csproj
+++ b/src/Avalonia.Visuals/Avalonia.Visuals.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <RootNamespace>Avalonia</RootNamespace>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
diff --git a/src/Avalonia.X11/Avalonia.X11.csproj b/src/Avalonia.X11/Avalonia.X11.csproj
index c160fd7726..f9efe5581f 100644
--- a/src/Avalonia.X11/Avalonia.X11.csproj
+++ b/src/Avalonia.X11/Avalonia.X11.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
-        <TargetFramework>netstandard2.0</TargetFramework>
+        <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
         <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
         <PackageId>Avalonia.X11</PackageId>
     </PropertyGroup>
diff --git a/src/Linux/Avalonia.LinuxFramebuffer/Avalonia.LinuxFramebuffer.csproj b/src/Linux/Avalonia.LinuxFramebuffer/Avalonia.LinuxFramebuffer.csproj
index 48095a4c25..41e3049bb8 100644
--- a/src/Linux/Avalonia.LinuxFramebuffer/Avalonia.LinuxFramebuffer.csproj
+++ b/src/Linux/Avalonia.LinuxFramebuffer/Avalonia.LinuxFramebuffer.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <PackageId>Avalonia.LinuxFramebuffer</PackageId>
   </PropertyGroup>
diff --git a/src/Markup/Avalonia.Markup.Xaml.Loader/Avalonia.Markup.Xaml.Loader.csproj b/src/Markup/Avalonia.Markup.Xaml.Loader/Avalonia.Markup.Xaml.Loader.csproj
index db9c414840..fdfb99789e 100644
--- a/src/Markup/Avalonia.Markup.Xaml.Loader/Avalonia.Markup.Xaml.Loader.csproj
+++ b/src/Markup/Avalonia.Markup.Xaml.Loader/Avalonia.Markup.Xaml.Loader.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <IsPackable>true</IsPackable>
     <PackageId>Avalonia.Markup.Xaml.Loader</PackageId>
     <DefineConstants>$(DefineConstants);XAMLX_INTERNAL</DefineConstants>
diff --git a/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj b/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj
index 217da2d50d..ac6aced8cb 100644
--- a/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj
+++ b/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <DefineConstants>$(DefineConstants);PCL;NETSTANDARD;NETSTANDARD2_0;HAS_TYPE_CONVERTER;HAS_CUSTOM_ATTRIBUTE_PROVIDER;XAMLX_INTERNAL</DefineConstants>
     <UseCecil>false</UseCecil>
     <DefineConstants Condition="$(UseCecil) == true">$(DefineConstants);RUNTIME_XAML_CECIL</DefineConstants>
diff --git a/src/Markup/Avalonia.Markup/Avalonia.Markup.csproj b/src/Markup/Avalonia.Markup/Avalonia.Markup.csproj
index 7b9cd0212e..e560732b41 100644
--- a/src/Markup/Avalonia.Markup/Avalonia.Markup.csproj
+++ b/src/Markup/Avalonia.Markup/Avalonia.Markup.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <RootNamespace>Avalonia</RootNamespace>
     <Nullable>Enable</Nullable>
     <WarningsAsErrors>CS8600;CS8602;CS8603</WarningsAsErrors>
diff --git a/src/Skia/Avalonia.Skia/Avalonia.Skia.csproj b/src/Skia/Avalonia.Skia/Avalonia.Skia.csproj
index 49311ae1f0..11a64c10ae 100644
--- a/src/Skia/Avalonia.Skia/Avalonia.Skia.csproj
+++ b/src/Skia/Avalonia.Skia/Avalonia.Skia.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <RootNamespace>Avalonia.Skia</RootNamespace>
     <AssemblyName>Avalonia.Skia</AssemblyName>
     <PackageId>Avalonia.Skia</PackageId>
diff --git a/src/Windows/Avalonia.Direct2D1/Avalonia.Direct2D1.csproj b/src/Windows/Avalonia.Direct2D1/Avalonia.Direct2D1.csproj
index 8533e1e176..d6c3368b7d 100644
--- a/src/Windows/Avalonia.Direct2D1/Avalonia.Direct2D1.csproj
+++ b/src/Windows/Avalonia.Direct2D1/Avalonia.Direct2D1.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <PackageId>Avalonia.Direct2D1</PackageId>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
diff --git a/src/Windows/Avalonia.Win32/Avalonia.Win32.csproj b/src/Windows/Avalonia.Win32/Avalonia.Win32.csproj
index 2a2aff322a..c8f08a5799 100644
--- a/src/Windows/Avalonia.Win32/Avalonia.Win32.csproj
+++ b/src/Windows/Avalonia.Win32/Avalonia.Win32.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <PackageId>Avalonia.Win32</PackageId>
   </PropertyGroup>