diff --git a/Avalonia.sln b/Avalonia.sln
index ddcd61408d..ffcf266b0c 100644
--- a/Avalonia.sln
+++ b/Avalonia.sln
@@ -226,6 +226,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Avalonia.ReactiveUI.Events"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Avalonia.ReactiveUI.Events.UnitTests", "tests\Avalonia.ReactiveUI.Events.UnitTests\Avalonia.ReactiveUI.Events.UnitTests.csproj", "{780AC0FE-8DD2-419F-A1DC-AC7E3EB393F7}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Sandbox", "samples\Sandbox\Sandbox.csproj", "{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}"
+EndProject
 Global
 	GlobalSection(SharedMSBuildProjectFiles) = preSolution
 		src\Shared\RenderHelpers\RenderHelpers.projitems*{3c4c0cb4-0c0f-4450-a37b-148c84ff905f}*SharedItemsImports = 13
@@ -2064,6 +2066,30 @@ Global
 		{780AC0FE-8DD2-419F-A1DC-AC7E3EB393F7}.Release|iPhone.Build.0 = Release|Any CPU
 		{780AC0FE-8DD2-419F-A1DC-AC7E3EB393F7}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
 		{780AC0FE-8DD2-419F-A1DC-AC7E3EB393F7}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Ad-Hoc|Any CPU.ActiveCfg = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Ad-Hoc|Any CPU.Build.0 = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Ad-Hoc|iPhone.ActiveCfg = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Ad-Hoc|iPhone.Build.0 = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Ad-Hoc|iPhoneSimulator.ActiveCfg = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Ad-Hoc|iPhoneSimulator.Build.0 = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.AppStore|Any CPU.ActiveCfg = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.AppStore|Any CPU.Build.0 = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.AppStore|iPhone.ActiveCfg = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.AppStore|iPhone.Build.0 = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.AppStore|iPhoneSimulator.ActiveCfg = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.AppStore|iPhoneSimulator.Build.0 = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Debug|iPhone.ActiveCfg = Debug|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Debug|iPhone.Build.0 = Debug|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Debug|iPhoneSimulator.ActiveCfg = Debug|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Debug|iPhoneSimulator.Build.0 = Debug|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Release|Any CPU.Build.0 = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Release|iPhone.ActiveCfg = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Release|iPhone.Build.0 = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -2123,6 +2149,7 @@ Global
 		{3C84E04B-36CF-4D0D-B965-C26DD649D1F3} = {A0CC0258-D18C-4AB3-854F-7101680FC3F9}
 		{909A8CBD-7D0E-42FD-B841-022AD8925820} = {8B6A8209-894F-4BA1-B880-965FD453982C}
 		{780AC0FE-8DD2-419F-A1DC-AC7E3EB393F7} = {C5A00AC3-B34C-4564-9BDD-2DA473EF4D8B}
+		{11BE52AF-E2DD-4CF0-B19A-05285ACAF571} = {9B9E3891-2366-4253-A952-D08BCEB71098}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {87366D66-1391-4D90-8999-95A620AD786A}
diff --git a/samples/Sandbox/App.axaml b/samples/Sandbox/App.axaml
new file mode 100644
index 0000000000..699781eb94
--- /dev/null
+++ b/samples/Sandbox/App.axaml
@@ -0,0 +1,8 @@
+<Application
+    xmlns="https://github.com/avaloniaui" 
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    x:Class="Sandbox.App">
+    <Application.Styles>
+        <StyleInclude Source="avares://Avalonia.Themes.Fluent/Accents/FluentDark.xaml"/>
+    </Application.Styles>
+</Application>
diff --git a/samples/Sandbox/App.axaml.cs b/samples/Sandbox/App.axaml.cs
new file mode 100644
index 0000000000..7eb8345784
--- /dev/null
+++ b/samples/Sandbox/App.axaml.cs
@@ -0,0 +1,22 @@
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+
+namespace Sandbox
+{
+    public class App : Application
+    {
+        public override void Initialize()
+        {
+            AvaloniaXamlLoader.Load(this);
+        }
+
+        public override void OnFrameworkInitializationCompleted()
+        {
+            if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktopLifetime)
+            {
+                desktopLifetime.MainWindow = new MainWindow();
+            }
+        }
+    }
+}
diff --git a/samples/Sandbox/MainWindow.axaml b/samples/Sandbox/MainWindow.axaml
new file mode 100644
index 0000000000..6929f192c7
--- /dev/null
+++ b/samples/Sandbox/MainWindow.axaml
@@ -0,0 +1,4 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'
+        x:Class="Sandbox.MainWindow">
+</Window>
diff --git a/samples/Sandbox/MainWindow.axaml.cs b/samples/Sandbox/MainWindow.axaml.cs
new file mode 100644
index 0000000000..b7222e043d
--- /dev/null
+++ b/samples/Sandbox/MainWindow.axaml.cs
@@ -0,0 +1,20 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace Sandbox
+{
+    public class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            this.InitializeComponent();
+            this.AttachDevTools();
+        }
+
+        private void InitializeComponent()
+        {
+            AvaloniaXamlLoader.Load(this);
+        }
+    }
+}
diff --git a/samples/Sandbox/Program.cs b/samples/Sandbox/Program.cs
new file mode 100644
index 0000000000..4d7eda8d9f
--- /dev/null
+++ b/samples/Sandbox/Program.cs
@@ -0,0 +1,17 @@
+using Avalonia;
+using Avalonia.ReactiveUI;
+
+namespace Sandbox
+{
+    public class Program
+    {
+        static void Main(string[] args)
+        {
+            AppBuilder.Configure<App>()
+                .UsePlatformDetect()
+                .UseReactiveUI()
+                .LogToDebug()
+                .StartWithClassicDesktopLifetime(args);
+        }
+    }
+}
diff --git a/samples/Sandbox/Sandbox.csproj b/samples/Sandbox/Sandbox.csproj
new file mode 100644
index 0000000000..1a0a8a7ce5
--- /dev/null
+++ b/samples/Sandbox/Sandbox.csproj
@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Avalonia.Diagnostics\Avalonia.Diagnostics.csproj" />
+    <ProjectReference Include="..\..\src\Avalonia.ReactiveUI\Avalonia.ReactiveUI.csproj" />
+    <ProjectReference Include="..\..\src\Avalonia.Controls.DataGrid\Avalonia.Controls.DataGrid.csproj" />
+  </ItemGroup>
+  
+  <Import Project="..\..\build\SampleApp.props" />
+  <Import Project="..\..\build\ReferenceCoreLibraries.props" />
+  <Import Project="..\..\build\BuildTargets.targets" />
+</Project>