Remove netstandard2.0 from almost all projects (#20111)

* Remove netstandard2.0 from almost all projects

* Fix duplicated target frameworks in unit tests

* Fix DesignerSupport tests

* Fix Designer.HostApp packaging

* Build ControlCatalog.Desktop on CI

* Fix another bad auto merge

* Fix LeakTests duplicated target frameworks

* Don't hardcode target framework in DesignerSupportTests

Avalonia.sln

@@ -86,8 +86,6 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ControlCatalog.Android", "s
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Avalonia.Skia", "src\Skia\Avalonia.Skia\Avalonia.Skia.csproj", "{7D2D3083-71DD-4CC9-8907-39A0D86FB322}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ControlCatalog.NetCore", "samples\ControlCatalog.NetCore\ControlCatalog.NetCore.csproj", "{39D7B147-1A5B-47C2-9D01-21FB7C47C4B3}"
-EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Props", "Props", "{F3AC8BC1-27F5-4255-9AFC-04ABFD11683A}"
 	ProjectSection(SolutionItems) = preProject
 		build\AvaloniaPublicKey.props = build\AvaloniaPublicKey.props
@@ -415,10 +413,6 @@ Global
 		{7D2D3083-71DD-4CC9-8907-39A0D86FB322}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{7D2D3083-71DD-4CC9-8907-39A0D86FB322}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{7D2D3083-71DD-4CC9-8907-39A0D86FB322}.Release|Any CPU.Build.0 = Release|Any CPU
-		{39D7B147-1A5B-47C2-9D01-21FB7C47C4B3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{39D7B147-1A5B-47C2-9D01-21FB7C47C4B3}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{39D7B147-1A5B-47C2-9D01-21FB7C47C4B3}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{39D7B147-1A5B-47C2-9D01-21FB7C47C4B3}.Release|Any CPU.Build.0 = Release|Any CPU
 		{854568D5-13D1-4B4F-B50D-534DC7EFD3C9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{854568D5-13D1-4B4F-B50D-534DC7EFD3C9}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{854568D5-13D1-4B4F-B50D-534DC7EFD3C9}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -714,7 +708,6 @@ Global
 		{F1FDC5B0-4654-416F-AE69-E3E9BBD87801} = {9B9E3891-2366-4253-A952-D08BCEB71098}
 		{29132311-1848-4FD6-AE0C-4FF841151BD3} = {9B9E3891-2366-4253-A952-D08BCEB71098}
 		{7D2D3083-71DD-4CC9-8907-39A0D86FB322} = {3743B0F2-CC41-4F14-A8C8-267F579BF91E}
-		{39D7B147-1A5B-47C2-9D01-21FB7C47C4B3} = {9B9E3891-2366-4253-A952-D08BCEB71098}
 		{854568D5-13D1-4B4F-B50D-534DC7EFD3C9} = {86C53C40-57AA-45B8-AD42-FAE0EFDF0F2B}
 		{CBC4FF2F-92D4-420B-BE21-9FE0B930B04E} = {B39A8919-9F95-48FE-AD7B-76E08B509888}
 		{E1582370-37B3-403C-917F-8209551B1634} = {C5A00AC3-B34C-4564-9BDD-2DA473EF4D8B}

Directory.Build.props

@@ -4,7 +4,7 @@
   <Import Project="$(MSBuildThisFileDirectory)/build/WarnAsErrors.props" />
   <PropertyGroup>
       <PackageOutputPath Condition="'$(PackageOutputPath)' == ''">$(MSBuildThisFileDirectory)build-intermediate/nuget</PackageOutputPath>
-      <AvaloniaPreviewerNetCoreToolPath>$(MSBuildThisFileDirectory)\src\tools\Avalonia.Designer.HostApp\bin\$(Configuration)\netstandard2.0\Avalonia.Designer.HostApp.dll</AvaloniaPreviewerNetCoreToolPath>
+      <AvaloniaPreviewerNetCoreToolPath>$(MSBuildThisFileDirectory)\src\tools\Avalonia.Designer.HostApp\bin\$(Configuration)\$(AvsCurrentTargetFramework)\Avalonia.Designer.HostApp.dll</AvaloniaPreviewerNetCoreToolPath>
       <!-- https://github.com/dotnet/msbuild/issues/2661 -->
       <AddSyntheticProjectReferencesForSolutionDependencies>false</AddSyntheticProjectReferencesForSolutionDependencies>
       <RunApiCompat>False</RunApiCompat>

dirs.proj

@@ -14,7 +14,6 @@
     <ProjectReference Remove="samples/*.Android/*.csproj" />
     <ProjectReference Remove="samples/*.Browser/*.csproj" />
     <ProjectReference Remove="samples/SingleProjectSandbox/*.csproj" />
-    <ProjectReference Remove="samples/ControlCatalog.Desktop/*.*proj" />
   </ItemGroup>
 
   <ItemGroup Condition="!$([MSBuild]::IsOsPlatform('Windows'))">

packages/Avalonia/Avalonia.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-      <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+      <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
       <PackageId>Avalonia</PackageId>
   </PropertyGroup>
 
@@ -27,13 +27,13 @@
     <MSBuild Projects="$(DesignerHostAppPath)/Avalonia.Designer.HostApp/Avalonia.Designer.HostApp.csproj" Properties="Configuration=$(Configuration);&#xA;Platform=$(Platform)" />
 
     <ItemGroup>
-      <_PackageFiles Include="$(DesignerHostAppPath)/Avalonia.Designer.HostApp/bin/$(Configuration)/netstandard2.0/Avalonia.Designer.HostApp.dll">
-        <PackagePath>tools/netstandard2.0/designer</PackagePath>
+      <_PackageFiles Include="$(DesignerHostAppPath)/Avalonia.Designer.HostApp/bin/$(Configuration)/$(AvsCurrentTargetFramework)/Avalonia.Designer.HostApp.dll">
+        <PackagePath>tools/$(AvsCurrentTargetFramework)/designer</PackagePath>
         <Visible>false</Visible>
         <BuildAction>None</BuildAction>
       </_PackageFiles>
-      <_PackageFiles Include="$(DesignerHostAppPath)/Avalonia.Designer.HostApp/bin/$(Configuration)/net461/Avalonia.Designer.HostApp.exe">
-        <PackagePath>tools/net461/designer</PackagePath>
+      <_PackageFiles Include="$(DesignerHostAppPath)/Avalonia.Designer.HostApp/bin/$(Configuration)/$(AvsLegacyTargetFrameworks)/Avalonia.Designer.HostApp.dll">
+        <PackagePath>tools/$(AvsLegacyTargetFrameworks)/designer</PackagePath>
         <Visible>false</Visible>
         <BuildAction>None</BuildAction>
       </_PackageFiles>

packages/Avalonia/Avalonia.props

@@ -1,7 +1,6 @@
 <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
-    <AvaloniaPreviewerNetCoreToolPath>$(MSBuildThisFileDirectory)\..\tools\netstandard2.0\designer\Avalonia.Designer.HostApp.dll</AvaloniaPreviewerNetCoreToolPath>
-    <AvaloniaPreviewerNetFullToolPath>$(MSBuildThisFileDirectory)\..\tools\net461\designer\Avalonia.Designer.HostApp.exe</AvaloniaPreviewerNetFullToolPath>
+    <AvaloniaPreviewerNetCoreToolPath>$(MSBuildThisFileDirectory)\..\tools\$(AvsCurrentTargetFramework)\designer\Avalonia.Designer.HostApp.dll</AvaloniaPreviewerNetCoreToolPath>
     <AvaloniaBuildTasksLocation>$(MSBuildThisFileDirectory)\..\tools\netstandard2.0\Avalonia.Build.Tasks.dll</AvaloniaBuildTasksLocation>
     <UsedAvaloniaProducts>$(UsedAvaloniaProducts);AvaloniaUI</UsedAvaloniaProducts>
     <EnableAvaloniaXamlCompilation Condition="'$(EnableAvaloniaXamlCompilation)'==''">true</EnableAvaloniaXamlCompilation>

samples/ControlCatalog.Desktop/ControlCatalog.Desktop.csproj

@@ -1,22 +1,41 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFramework>net461</TargetFramework>
-    <PlatformTarget>x64</PlatformTarget>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>$(AvsCurrentTargetFramework)</TargetFramework>
+    <TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-    <ApplicationManifest>../ControlCatalog.NetCore/app.manifest</ApplicationManifest>
   </PropertyGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\ControlCatalog\ControlCatalog.csproj" />
-    <ProjectReference Include="..\..\src\Avalonia.Diagnostics\Avalonia.Diagnostics.csproj" />
+    <Compile Include="..\..\src\Avalonia.X11\NativeDialogs\Gtk.cs" Link="NativeControls\Gtk\Gtk.cs" />
+    <Compile Include="..\..\src\Avalonia.X11\Interop\Glib.cs" Link="NativeControls\Gtk\Glib.cs" />
+    <Compile Include="..\..\src\Avalonia.Base\Platform\Interop\Utf8Buffer.cs" Link="NativeControls\Utf8Buffer.cs" />
   </ItemGroup>
 
   <ItemGroup>
-    <Compile Include="..\ControlCatalog.NetCore\NativeControls\Win\*.cs" Link="NativeControls\*" />
+    <Content Include="NativeControls\Gtk\nodes.mp4">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
   </ItemGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Avalonia.Diagnostics\Avalonia.Diagnostics.csproj" />
+    <ProjectReference Include="..\..\src\Headless\Avalonia.Headless.Vnc\Avalonia.Headless.Vnc.csproj" />
+    <ProjectReference Include="..\..\src\Avalonia.Dialogs\Avalonia.Dialogs.csproj" />
+    <ProjectReference Include="..\..\src\Linux\Avalonia.LinuxFramebuffer\Avalonia.LinuxFramebuffer.csproj" />
+    <ProjectReference Include="..\ControlCatalog\ControlCatalog.csproj" />
+    <ProjectReference Include="..\..\src\Avalonia.X11\Avalonia.X11.csproj" />
+    <!-- For native controls test -->
+    <PackageReference Include="MonoMac.NetStandard" Version="0.0.4" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <!-- For Microsoft.CodeAnalysis -->
+    <SatelliteResourceLanguages>en</SatelliteResourceLanguages>
+    <ApplicationManifest>app.manifest</ApplicationManifest>
+  </PropertyGroup>
+
   <Import Project="..\..\build\SampleApp.props" />
-  <Import Project="..\..\build\NetFX.props" />
+  <Import Project="..\..\build\ReferenceCoreLibraries.props" />
 </Project>

samples/ControlCatalog.Desktop/NativeControls/Gtk/EmbedSample.Gtk.cs

@@ -5,7 +5,7 @@ using Avalonia.Controls.Platform;
 using System;
 using ControlCatalog.Pages;
 
-namespace ControlCatalog.NetCore;
+namespace ControlCatalog.Desktop;
 
 public class EmbedSampleGtk : INativeDemoControl
 {

samples/ControlCatalog.Desktop/NativeControls/Gtk/GtkHelper.cs

@@ -7,7 +7,7 @@ using Avalonia.X11.NativeDialogs;
 using static Avalonia.X11.NativeDialogs.Gtk;
 using static Avalonia.X11.Interop.Glib;
 
-namespace ControlCatalog.NetCore;
+namespace ControlCatalog.Desktop;
 
 internal class GtkHelper
 {

samples/ControlCatalog.Desktop/NativeControls/Mac/EmbedSample.Mac.cs

@@ -8,7 +8,7 @@ using ControlCatalog.Pages;
 using MonoMac.Foundation;
 using MonoMac.WebKit;
 
-namespace ControlCatalog.NetCore;
+namespace ControlCatalog.Desktop;
 
 public class EmbedSampleMac : INativeDemoControl
 {

samples/ControlCatalog.Desktop/NativeControls/Mac/MacHelper.cs

@@ -3,7 +3,7 @@ using System;
 using Avalonia.Controls.Platform;
 using MonoMac.AppKit;
 
-namespace ControlCatalog.NetCore;
+namespace ControlCatalog.Desktop;
 
 internal class MacHelper
 {

samples/ControlCatalog.Desktop/NativeControls/Win/EmbedSample.Win.cs

@@ -6,7 +6,7 @@ using Avalonia.Platform;
 
 using ControlCatalog.Pages;
 
-namespace ControlCatalog.NetCore;
+namespace ControlCatalog.Desktop;
 
 public class EmbedSampleWin : INativeDemoControl
 {

samples/ControlCatalog.Desktop/NativeControls/Win/WinApi.cs

@@ -1,7 +1,7 @@
 using System;
 using System.Runtime.InteropServices;
 
-namespace ControlCatalog.NetCore;
+namespace ControlCatalog.Desktop;
 
 internal unsafe class WinApi
 {

samples/ControlCatalog.Desktop/Program.cs

@@ -1,38 +1,180 @@
 using System;
+using System.Diagnostics;
+using System.Globalization;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
 using Avalonia;
-using Avalonia.Platform;
-using ControlCatalog.NetCore;
+using Avalonia.Controls;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Fonts.Inter;
+using Avalonia.Headless;
+using Avalonia.LinuxFramebuffer.Output;
+using Avalonia.LogicalTree;
+using Avalonia.Rendering.Composition;
+using Avalonia.Threading;
+using Avalonia.Vulkan;
 using ControlCatalog.Pages;
 
-namespace ControlCatalog
+namespace ControlCatalog.Desktop
 {
-    internal class Program
+    static class Program
     {
+        private static bool s_useFramebuffer;
+        
         [STAThread]
-        public static int Main(string[] args)
-            => BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
+        static int Main(string[] args)
+        {
+            if (args.Contains("--fbdev"))
+            {
+                s_useFramebuffer = true;
+            }
+
+            if (args.Contains("--wait-for-attach"))
+            {
+                Console.WriteLine("Attach debugger and use 'Set next statement'");
+                while (true)
+                {
+                    Thread.Sleep(100);
+                    if (Debugger.IsAttached)
+                        break;
+                }
+            }
+
+            var builder = BuildAvaloniaApp();
+
+            double GetScaling()
+            {
+                var idx = Array.IndexOf(args, "--scaling");
+                if (idx != 0 && args.Length > idx + 1 &&
+                    double.TryParse(args[idx + 1], NumberStyles.Any, CultureInfo.InvariantCulture, out var scaling))
+                    return scaling;
+                return 1;
+            }
+            if (s_useFramebuffer)
+            {
+                 SilenceConsole();
+                 return builder.StartLinuxFbDev(args, new FbDevOutputOptions()
+                 {
+                     Scaling = GetScaling()
+                 });
+            }
+            else if (args.Contains("--vnc"))
+            {
+                return builder.StartWithHeadlessVncPlatform(null, 5901, args, ShutdownMode.OnMainWindowClose);
+            }
+            else if (args.Contains("--full-headless"))
+            {
+                return builder
+                    .UseHeadless(new AvaloniaHeadlessPlatformOptions
+                    {
+                        UseHeadlessDrawing = true
+                    })
+                    .AfterSetup(_ =>
+                    {
+                        DispatcherTimer.RunOnce(async () =>
+                        {
+                            var window = ((IClassicDesktopStyleApplicationLifetime)Application.Current.ApplicationLifetime)
+                                .MainWindow;
+                            var tc = window.GetLogicalDescendants().OfType<TabControl>().First();
+                            foreach (var page in tc.Items.Cast<TabItem>().ToList())
+                            {
+                                if (page.Header.ToString() == "DatePicker" || page.Header.ToString() == "TreeView")
+                                    continue;
+                                Console.WriteLine("Selecting " + page.Header);
+                                tc.SelectedItem = page;
+                                await Task.Delay(50);
+                            }
+                            Console.WriteLine("Selecting the first page");
+                            tc.SelectedItem = tc.Items.OfType<object>().First();
+                            await Task.Delay(500);
+                            Console.WriteLine("Clicked through all pages, triggering GC");
+                            for (var c = 0; c < 3; c++)
+                            {
+                                GC.Collect(2, GCCollectionMode.Forced);
+                                await Task.Delay(50);
+                            }
+
+                            void FormatMem(string metric, long bytes)
+                            {
+                                Console.WriteLine(metric + ": " + bytes / 1024 / 1024 + "MB");
+                            }
+
+                            FormatMem("GC allocated bytes", GC.GetTotalMemory(true));
+                            FormatMem("WorkingSet64", Process.GetCurrentProcess().WorkingSet64);
+                        }, TimeSpan.FromSeconds(1));
+                    })
+                    .StartWithClassicDesktopLifetime(args);
+            }
+            else if (args.Contains("--drm"))
+            {
+                SilenceConsole();
+                return builder.StartLinuxDrm(args, scaling: GetScaling());
+            }
+            else if (args.Contains("--dxgi"))
+            {
+                builder.With(new Win32PlatformOptions()
+                {
+                    CompositionMode = new [] { Win32CompositionMode.LowLatencyDxgiSwapChain }
+                });
+                return builder.StartWithClassicDesktopLifetime(args);
+            }
+            else
+                return builder.StartWithClassicDesktopLifetime(args);
+        }
 
         /// <summary>
         /// This method is needed for IDE previewer infrastructure
         /// </summary>
         public static AppBuilder BuildAvaloniaApp()
             => AppBuilder.Configure<App>()
-                .LogToTrace()
+                .UsePlatformDetect()
+                .With(new X11PlatformOptions
+                {
+                    EnableMultiTouch = true,
+                    UseDBusMenu = true,
+                    EnableIme = true,
+                })
+
+                .With(new VulkanOptions
+                {
+                    VulkanInstanceCreationOptions = new ()
+                    {
+                        UseDebug = true
+                    }
+                })
+                .With(new CompositionOptions()
+                {
+                    UseRegionDirtyRectClipping = true
+                })
+                .UseSkia()
+                .WithInterFont()
                 .AfterSetup(builder =>
                 {
-                    builder.Instance!.AttachDevTools(new Avalonia.Diagnostics.DevToolsOptions()
+                    if (!s_useFramebuffer)
                     {
-                        StartupScreenIndex = 1,
-                    });
+                        builder.Instance!.AttachDevTools(new Avalonia.Diagnostics.DevToolsOptions()
+                        {
+                            StartupScreenIndex = 1,
+                        });
+                    }
 
-                    EmbedSample.Implementation = new EmbedSampleWin();
+                    EmbedSample.Implementation = OperatingSystem.IsWindows() ? (INativeDemoControl)new EmbedSampleWin()
+                        : OperatingSystem.IsMacOS() ? new EmbedSampleMac()
+                        : OperatingSystem.IsLinux() ? new EmbedSampleGtk()
+                        : null;
                 })
-                .UseWin32()
-                .UseSkia();
+                .LogToTrace();
 
-        private static void ConfigureAssetAssembly(AppBuilder builder)
+        static void SilenceConsole()
         {
-            AssetLoader.SetDefaultAssembly(typeof(App).Assembly);
+            new Thread(() =>
+            {
+                Console.CursorVisible = false;
+                while (true)
+                    Console.ReadKey(true);
+            })
+            { IsBackground = true }.Start();
         }
     }
 }

samples/ControlCatalog.Desktop/Properties/launchSettings.json

@@ -1,6 +1,6 @@
 {
   "profiles": {
-    "ControlCatalog.NetCore": {
+    "ControlCatalog.Desktop": {
       "commandName": "Project"
     },
     "Dxgi": {

samples/ControlCatalog.NetCore/ControlCatalog.NetCore.csproj

@@ -1,41 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <OutputType>WinExe</OutputType>
-    <TargetFramework>$(AvsCurrentTargetFramework)</TargetFramework>
-    <TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>
-    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <Compile Include="..\..\src\Avalonia.X11\NativeDialogs\Gtk.cs" Link="NativeControls\Gtk\Gtk.cs" />
-    <Compile Include="..\..\src\Avalonia.X11\Interop\Glib.cs" Link="NativeControls\Gtk\Glib.cs" />
-    <Compile Include="..\..\src\Avalonia.Base\Platform\Interop\Utf8Buffer.cs" Link="NativeControls\Utf8Buffer.cs" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <Content Include="NativeControls\Gtk\nodes.mp4">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\..\src\Avalonia.Diagnostics\Avalonia.Diagnostics.csproj" />
-    <ProjectReference Include="..\..\src\Headless\Avalonia.Headless.Vnc\Avalonia.Headless.Vnc.csproj" />
-    <ProjectReference Include="..\..\src\Avalonia.Dialogs\Avalonia.Dialogs.csproj" />
-    <ProjectReference Include="..\..\src\Linux\Avalonia.LinuxFramebuffer\Avalonia.LinuxFramebuffer.csproj" />
-    <ProjectReference Include="..\ControlCatalog\ControlCatalog.csproj" />
-    <ProjectReference Include="..\..\src\Avalonia.X11\Avalonia.X11.csproj" />
-    <!-- For native controls test -->
-    <PackageReference Include="MonoMac.NetStandard" Version="0.0.4" />
-  </ItemGroup>
-
-  <PropertyGroup>
-    <!-- For Microsoft.CodeAnalysis -->
-    <SatelliteResourceLanguages>en</SatelliteResourceLanguages>
-    <ApplicationManifest>app.manifest</ApplicationManifest>
-  </PropertyGroup>
-
-  <Import Project="..\..\build\SampleApp.props" />
-  <Import Project="..\..\build\ReferenceCoreLibraries.props" />
-</Project>

samples/ControlCatalog.NetCore/Program.cs

@@ -1,180 +0,0 @@
-using System;
-using System.Diagnostics;
-using System.Globalization;
-using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
-using Avalonia;
-using Avalonia.Controls;
-using Avalonia.Controls.ApplicationLifetimes;
-using Avalonia.Fonts.Inter;
-using Avalonia.Headless;
-using Avalonia.LinuxFramebuffer.Output;
-using Avalonia.LogicalTree;
-using Avalonia.Rendering.Composition;
-using Avalonia.Threading;
-using Avalonia.Vulkan;
-using ControlCatalog.Pages;
-
-namespace ControlCatalog.NetCore
-{
-    static class Program
-    {
-        private static bool s_useFramebuffer;
-        
-        [STAThread]
-        static int Main(string[] args)
-        {
-            if (args.Contains("--fbdev"))
-            {
-                s_useFramebuffer = true;
-            }
-
-            if (args.Contains("--wait-for-attach"))
-            {
-                Console.WriteLine("Attach debugger and use 'Set next statement'");
-                while (true)
-                {
-                    Thread.Sleep(100);
-                    if (Debugger.IsAttached)
-                        break;
-                }
-            }
-
-            var builder = BuildAvaloniaApp();
-
-            double GetScaling()
-            {
-                var idx = Array.IndexOf(args, "--scaling");
-                if (idx != 0 && args.Length > idx + 1 &&
-                    double.TryParse(args[idx + 1], NumberStyles.Any, CultureInfo.InvariantCulture, out var scaling))
-                    return scaling;
-                return 1;
-            }
-            if (s_useFramebuffer)
-            {
-                 SilenceConsole();
-                 return builder.StartLinuxFbDev(args, new FbDevOutputOptions()
-                 {
-                     Scaling = GetScaling()
-                 });
-            }
-            else if (args.Contains("--vnc"))
-            {
-                return builder.StartWithHeadlessVncPlatform(null, 5901, args, ShutdownMode.OnMainWindowClose);
-            }
-            else if (args.Contains("--full-headless"))
-            {
-                return builder
-                    .UseHeadless(new AvaloniaHeadlessPlatformOptions
-                    {
-                        UseHeadlessDrawing = true
-                    })
-                    .AfterSetup(_ =>
-                    {
-                        DispatcherTimer.RunOnce(async () =>
-                        {
-                            var window = ((IClassicDesktopStyleApplicationLifetime)Application.Current.ApplicationLifetime)
-                                .MainWindow;
-                            var tc = window.GetLogicalDescendants().OfType<TabControl>().First();
-                            foreach (var page in tc.Items.Cast<TabItem>().ToList())
-                            {
-                                if (page.Header.ToString() == "DatePicker" || page.Header.ToString() == "TreeView")
-                                    continue;
-                                Console.WriteLine("Selecting " + page.Header);
-                                tc.SelectedItem = page;
-                                await Task.Delay(50);
-                            }
-                            Console.WriteLine("Selecting the first page");
-                            tc.SelectedItem = tc.Items.OfType<object>().First();
-                            await Task.Delay(500);
-                            Console.WriteLine("Clicked through all pages, triggering GC");
-                            for (var c = 0; c < 3; c++)
-                            {
-                                GC.Collect(2, GCCollectionMode.Forced);
-                                await Task.Delay(50);
-                            }
-
-                            void FormatMem(string metric, long bytes)
-                            {
-                                Console.WriteLine(metric + ": " + bytes / 1024 / 1024 + "MB");
-                            }
-
-                            FormatMem("GC allocated bytes", GC.GetTotalMemory(true));
-                            FormatMem("WorkingSet64", Process.GetCurrentProcess().WorkingSet64);
-                        }, TimeSpan.FromSeconds(1));
-                    })
-                    .StartWithClassicDesktopLifetime(args);
-            }
-            else if (args.Contains("--drm"))
-            {
-                SilenceConsole();
-                return builder.StartLinuxDrm(args, scaling: GetScaling());
-            }
-            else if (args.Contains("--dxgi"))
-            {
-                builder.With(new Win32PlatformOptions()
-                {
-                    CompositionMode = new [] { Win32CompositionMode.LowLatencyDxgiSwapChain }
-                });
-                return builder.StartWithClassicDesktopLifetime(args);
-            }
-            else
-                return builder.StartWithClassicDesktopLifetime(args);
-        }
-
-        /// <summary>
-        /// This method is needed for IDE previewer infrastructure
-        /// </summary>
-        public static AppBuilder BuildAvaloniaApp()
-            => AppBuilder.Configure<App>()
-                .UsePlatformDetect()
-                .With(new X11PlatformOptions
-                {
-                    EnableMultiTouch = true,
-                    UseDBusMenu = true,
-                    EnableIme = true,
-                })
-
-                .With(new VulkanOptions
-                {
-                    VulkanInstanceCreationOptions = new ()
-                    {
-                        UseDebug = true
-                    }
-                })
-                .With(new CompositionOptions()
-                {
-                    UseRegionDirtyRectClipping = true
-                })
-                .UseSkia()
-                .WithInterFont()
-                .AfterSetup(builder =>
-                {
-                    if (!s_useFramebuffer)
-                    {
-                        builder.Instance!.AttachDevTools(new Avalonia.Diagnostics.DevToolsOptions()
-                        {
-                            StartupScreenIndex = 1,
-                        });
-                    }
-
-                    EmbedSample.Implementation = OperatingSystem.IsWindows() ? (INativeDemoControl)new EmbedSampleWin()
-                        : OperatingSystem.IsMacOS() ? new EmbedSampleMac()
-                        : OperatingSystem.IsLinux() ? new EmbedSampleGtk()
-                        : null;
-                })
-                .LogToTrace();
-
-        static void SilenceConsole()
-        {
-            new Thread(() =>
-            {
-                Console.CursorVisible = false;
-                while (true)
-                    Console.ReadKey(true);
-            })
-            { IsBackground = true }.Start();
-        }
-    }
-}

samples/ControlCatalog/ControlCatalog.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;$(AvsCurrentTargetFramework)</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <Nullable>enable</Nullable>
     <IncludeAvaloniaGenerators>true</IncludeAvaloniaGenerators>

samples/Directory.Build.props

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <IsPackable>false</IsPackable>
-    <AvaloniaPreviewerNetCoreToolPath>$(MSBuildThisFileDirectory)..\src\tools\Avalonia.Designer.HostApp\bin\Debug\netstandard2.0\Avalonia.Designer.HostApp.dll</AvaloniaPreviewerNetCoreToolPath>
+    <AvaloniaPreviewerNetCoreToolPath>$(MSBuildThisFileDirectory)..\src\tools\Avalonia.Designer.HostApp\bin\Debug\$(AvsCurrentTargetFramework)\Avalonia.Designer.HostApp.dll</AvaloniaPreviewerNetCoreToolPath>
     <EnableNETAnalyzers>false</EnableNETAnalyzers>
     <LangVersion>14.0</LangVersion>
     <NoWarn>$(NoWarn);CS8002</NoWarn> <!-- ignore signing warnings for samples -->

samples/MiniMvvm/MiniMvvm.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFramework>$(AvsCurrentTargetFramework)</TargetFramework>
     <Nullable>enable</Nullable>
   </PropertyGroup>
   

samples/SampleControls/ControlSamples.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFramework>$(AvsCurrentTargetFramework)</TargetFramework>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 

samples/XEmbedSample/XEmbedSample.csproj

@@ -7,6 +7,13 @@
     <Nullable>enable</Nullable>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>$(AvsCurrentTargetFramework)</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    </PropertyGroup>
 
   <ItemGroup>
     <PackageReference Include="GtkSharp" Version="3.24.24.95"/>

samples/interop/WindowsInteropTest/WindowsInteropTest.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFrameworks>net461;$(AvsCurrentWindowsTargetFramework)</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentWindowsTargetFramework)</TargetFrameworks>
     <UseWPF>true</UseWPF>
     <UseWindowsForms>true</UseWindowsForms>
     <EnableWindowsTargeting>true</EnableWindowsTargeting>

src/Avalonia.Base/Avalonia.Base.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <RootNamespace>Avalonia</RootNamespace>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>

src/Avalonia.Controls.ColorPicker/Avalonia.Controls.ColorPicker.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
   <ItemGroup>

src/Avalonia.Controls/Avalonia.Controls.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\Avalonia.Base\Avalonia.Base.csproj" />

src/Avalonia.DesignerSupport/Avalonia.DesignerSupport.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</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

src/Avalonia.Desktop/Avalonia.Desktop.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>

src/Avalonia.Diagnostics/Avalonia.Diagnostics.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <RootNamespace>Avalonia</RootNamespace>
     <DefineConstants>$(DefineConstants);DATAGRID_INTERNAL</DefineConstants>
   </PropertyGroup>

src/Avalonia.Dialogs/Avalonia.Dialogs.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>

src/Avalonia.Fonts.Inter/Avalonia.Fonts.Inter.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
     <AvaloniaResource Include="Assets\*" />

src/Avalonia.FreeDesktop/Avalonia.FreeDesktop.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <Nullable>enable</Nullable>
     <EnableRuntimeMarshalling>true</EnableRuntimeMarshalling>
   </PropertyGroup>

src/Avalonia.Metal/Avalonia.Metal.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 

src/Avalonia.MicroCom/Avalonia.MicroCom.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
   <ItemGroup>

src/Avalonia.Native/Avalonia.Native.csproj

@@ -5,7 +5,7 @@
     <IsPackable>$(PackAvaloniaNative)</IsPackable>
     <IsPackable Condition="'$([MSBuild]::IsOSPlatform(OSX))' == 'True'">true</IsPackable>
     <IsPackable Condition="'$(ForcePackAvaloniaNative)' == 'True'">True</IsPackable>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 

src/Avalonia.OpenGL/Avalonia.OpenGL.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 

src/Avalonia.Themes.Fluent/Avalonia.Themes.Fluent.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\Avalonia.Base\Avalonia.Base.csproj" />

src/Avalonia.Themes.Simple/Avalonia.Themes.Simple.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\Avalonia.Base\Avalonia.Base.csproj" />

src/Avalonia.Vulkan/Avalonia.Vulkan.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+        <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
         <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     </PropertyGroup>
 

src/Avalonia.X11/Avalonia.X11.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <EnableRuntimeMarshalling>true</EnableRuntimeMarshalling>
   </PropertyGroup>

src/Headless/Avalonia.Headless.NUnit/Avalonia.Headless.NUnit.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <IsTestProject>false</IsTestProject>
   </PropertyGroup>
 

src/Headless/Avalonia.Headless.Vnc/Avalonia.Headless.Vnc.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-      <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+      <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
       <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     </PropertyGroup>
 

src/Headless/Avalonia.Headless.XUnit/Avalonia.Headless.XUnit.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <IsTestProject>false</IsTestProject>
   </PropertyGroup>
 

src/Headless/Avalonia.Headless/Avalonia.Headless.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>

src/Linux/Avalonia.LinuxFramebuffer/Avalonia.LinuxFramebuffer.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <EnableRuntimeMarshalling>true</EnableRuntimeMarshalling>
   </PropertyGroup>

src/Markup/Avalonia.Markup.Xaml.Loader/Avalonia.Markup.Xaml.Loader.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <IsPackable>true</IsPackable>
     <IsAotCompatible>false</IsAotCompatible>
     <DefineConstants>$(DefineConstants);XAMLX_INTERNAL;XAML_RUNTIME_LOADER</DefineConstants>

src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</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>

src/Markup/Avalonia.Markup/Avalonia.Markup.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <RootNamespace>Avalonia</RootNamespace>
   </PropertyGroup>
   <ItemGroup>

src/Skia/Avalonia.Skia/Avalonia.Skia.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <IncludeLinuxSkia>true</IncludeLinuxSkia>
     <IncludeWasmSkia>true</IncludeWasmSkia>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>

src/Windows/Avalonia.Direct2D1/Avalonia.Direct2D1.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>

src/Windows/Avalonia.Win32.Automation/Avalonia.Win32.Automation.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <BuiltInComInteropSupport Condition="!$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net8.0'))">true</BuiltInComInteropSupport>
   </PropertyGroup>

src/Windows/Avalonia.Win32.Interoperability/Avalonia.Win32.Interoperability.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net461;$(AvsLegacyWindowsTargetFrameworks);$(AvsCurrentWindowsTargetFramework)</TargetFrameworks>
+    <TargetFrameworks>$(AvsLegacyWindowsTargetFrameworks);$(AvsCurrentWindowsTargetFramework)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <UseWindowsForms>true</UseWindowsForms>
     <EnableWindowsTargeting>true</EnableWindowsTargeting>

src/Windows/Avalonia.Win32/Avalonia.Win32.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks);netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <EnableRuntimeMarshalling>true</EnableRuntimeMarshalling>
     <!-- We still keep BinaryFormatter for WinForms compatibility. -->

src/tools/Avalonia.Designer.HostApp/Avalonia.Designer.HostApp.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net461;netstandard2.0;$(AvsCurrentTargetFramework)</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);$(AvsLegacyTargetFrameworks)</TargetFrameworks>
     <DefineConstants>$(DefineConstants);XAMLX_INTERNAL</DefineConstants>
     <IsAotCompatible>false</IsAotCompatible>
   </PropertyGroup>

tests/Avalonia.Build.Tasks.UnitTest/Avalonia.Build.Tasks.UnitTest.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net472</TargetFramework>
+    <TargetFrameworks>$(AvsCurrentTargetFramework);net481</TargetFrameworks>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <OutputType>Library</OutputType>
     <IsPackable>false</IsPackable>
@@ -15,10 +15,10 @@
   <Import Project="..\..\build\XUnit.props" />
   <Import Project="..\..\build\SharedVersion.props" />
   <ItemGroup>
-    <Content Include="..\TestFiles\BuildTasks\PInvoke\bin\$(Configuration)\netstandard2.0\PInvoke.dll" Link="Assets\PInvoke.dll">
+    <Content Include="..\TestFiles\BuildTasks\PInvoke\bin\$(Configuration)\$(AvsCurrentTargetFramework)\PInvoke.dll" Link="Assets\PInvoke.dll">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </Content>
-    <Content Include="..\TestFiles\BuildTasks\PInvoke\bin\$(Configuration)\netstandard2.0\PInvoke.dll.refs" Link="Assets\PInvoke.dll.refs">
+    <Content Include="..\TestFiles\BuildTasks\PInvoke\bin\$(Configuration)\$(AvsCurrentTargetFramework)\PInvoke.dll.refs" Link="Assets\PInvoke.dll.refs">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </Content>
   </ItemGroup>
@@ -33,7 +33,7 @@
     <!-- Ensure PInvoke.csproj is build before Avalonia.Build.Tasks.UnitTest -->
     <ProjectReference Include="..\TestFiles\BuildTasks\PInvoke\PInvoke.csproj" 
                       SetConfiguration="Configuration=$(Configuration)"
-                      SetTargetFramework="TargetFramework=netstandard2.0"
+                      SetTargetFramework="TargetFramework=$(AvsCurrentTargetFramework)"
                       ReferenceOutputAssembly="false" 
                       PrivateAssets="all" />
   </ItemGroup>

tests/Avalonia.DesignerSupport.Tests/DesignerSupportTests.cs

@@ -19,7 +19,7 @@ namespace Avalonia.DesignerSupport.Tests
 {
     public class DesignerSupportTests
     {
-        private const string DesignerAppPath = "../../../../../src/tools/Avalonia.Designer.HostApp/bin/$BUILD/netstandard2.0/Avalonia.Designer.HostApp.dll";
+        private const string DesignerAppPath = "../../../../../src/tools/Avalonia.Designer.HostApp/bin/$BUILD/$TFM/Avalonia.Designer.HostApp.dll";
         private readonly Xunit.Abstractions.ITestOutputHelper outputHelper;
 
         public DesignerSupportTests(Xunit.Abstractions.ITestOutputHelper outputHelper)
@@ -29,26 +29,26 @@ namespace Avalonia.DesignerSupport.Tests
 
         [SkippableTheory,
          InlineData(
-            @"..\..\..\..\..\tests/Avalonia.DesignerSupport.TestApp/bin/$BUILD/net10.0/",
+            @"..\..\..\..\..\tests/Avalonia.DesignerSupport.TestApp/bin/$BUILD/$TFM/",
             "Avalonia.DesignerSupport.TestApp",
             "Avalonia.DesignerSupport.TestApp.dll",
             @"..\..\..\..\..\tests\Avalonia.DesignerSupport.TestApp\MainWindow.xaml",
             "win32"),
          InlineData(
-            @"..\..\..\..\..\samples\ControlCatalog.NetCore\bin\$BUILD\net10.0\",
-            "ControlCatalog.NetCore",
+            @"..\..\..\..\..\samples\ControlCatalog.Desktop\bin\$BUILD\$TFM\",
+            "ControlCatalog.Desktop",
             "ControlCatalog.dll",
             @"..\..\..\..\..\samples\ControlCatalog\MainWindow.xaml",
             "win32"),
         InlineData(
-            @"..\..\..\..\..\tests/Avalonia.DesignerSupport.TestApp/bin/$BUILD/net10.0/",
+            @"..\..\..\..\..\tests/Avalonia.DesignerSupport.TestApp/bin/$BUILD/$TFM/",
             "Avalonia.DesignerSupport.TestApp",
             "Avalonia.DesignerSupport.TestApp.dll",
             @"..\..\..\..\..\tests\Avalonia.DesignerSupport.TestApp\MainWindow.xaml",
             "avalonia-remote"),
         InlineData(
-            @"..\..\..\..\..\samples\ControlCatalog.NetCore\bin\$BUILD\net10.0\",
-            "ControlCatalog.NetCore",
+            @"..\..\..\..\..\samples\ControlCatalog.Desktop\bin\$BUILD\$TFM\",
+            "ControlCatalog.Desktop",
             "ControlCatalog.dll",
             @"..\..\..\..\..\samples\ControlCatalog\MainWindow.xaml",
             "avalonia-remote")]
@@ -72,7 +72,9 @@ namespace Avalonia.DesignerSupport.Tests
 #else
             buildType = "Release";
 #endif
-            outputDir = outputDir.Replace("$BUILD", buildType);
+            var tfm = $"net{Environment.Version.ToString(2)}";
+
+            outputDir = outputDir.Replace("$BUILD", buildType).Replace("$TFM", tfm);
 
             var assemblyPath = Path.Combine(outputDir, assemblyName);
             Assert.True(File.Exists(assemblyPath), "File.Exists(assemblyPath)");
@@ -133,7 +135,7 @@ namespace Avalonia.DesignerSupport.Tests
 
             var cmdline =
                 $"exec --runtimeconfig \"{outputDir}{executableName}.runtimeconfig.json\" --depsfile \"{outputDir}{executableName}.deps.json\" "
-                + $" \"{DesignerAppPath.Replace("$BUILD", buildType)}\" "
+                + $" \"{DesignerAppPath.Replace("$BUILD", buildType).Replace("$TFM", tfm)}\" "
                 + $"--transport tcp-bson://127.0.0.1:{port}/ --session-id {sessionId} --method {method} \"{outputDir}{executableName}.dll\"";
 
             using (var proc = new Process

tests/Avalonia.LeakTests/Avalonia.LeakTests.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework)</TargetFrameworks>
+    <TargetFramework>$(AvsCurrentTargetFramework)</TargetFramework>
   </PropertyGroup>
   <Import Project="..\..\build\JetBrains.dotMemoryUnit.props" />
   <Import Project="..\..\build\Moq.props" />

tests/Avalonia.Markup.Xaml.UnitTests/Avalonia.Markup.Xaml.UnitTests.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk" ToolsVersion="15.0">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);net481</TargetFrameworks>
+    <TargetFrameworks>$(AvsCurrentTargetFramework)</TargetFrameworks>
     <OutputType>Library</OutputType>
     <IsTestProject>true</IsTestProject>
   </PropertyGroup>

tests/Avalonia.UnitTests/Avalonia.UnitTests.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);net481</TargetFrameworks>
+    <TargetFramework>$(AvsCurrentTargetFramework)</TargetFramework>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <OutputType>Library</OutputType>
     <IsPackable>false</IsPackable>

tests/TestFiles/BuildTasks/PInvoke/PInvoke.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFrameworks>$(AvsCurrentTargetFramework);netstandard2.0</TargetFrameworks>
+    <TargetFramework>$(AvsCurrentTargetFramework)</TargetFramework>
     <TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>
     <IncludeAvaloniaGenerators>true</IncludeAvaloniaGenerators>
     <!--<AvaloniaXamlIlDebuggerLaunch>true</AvaloniaXamlIlDebuggerLaunch>-->