Add WPF Calc app that uses CompactOverlay and DrawingIsland

Samples/Islands/DrawingIsland/CalculatorDemo/App.config

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+<?xml version="1.0" encoding="utf-8"?>
+
+<configuration>
+  <startup>
+    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
+  </startup>
+</configuration>

Samples/Islands/DrawingIsland/CalculatorDemo/App.cs

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+// // Copyright (c) Microsoft. All rights reserved.
+// // Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.UI.Dispatching;
+using System.Windows;
+
+namespace CalculatorDemo
+{
+    /// <summary>
+    ///     Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+        // Many WinAppSDK APIs require a DispatcherQueue to be running on the thread.  We'll start one when the app starts up
+        // and shut it down when the app is finished.
+        protected override void OnStartup(StartupEventArgs e)
+        {
+            _dispatcherQueueController = DispatcherQueueController.CreateOnCurrentThread();
+            base.OnStartup(e);
+        }
+
+        protected override void OnExit(ExitEventArgs e)
+        {
+            base.OnExit(e);
+            _dispatcherQueueController?.ShutdownQueue();
+            _dispatcherQueueController = null;
+        }
+
+        DispatcherQueueController? _dispatcherQueueController;
+    }
+}

Samples/Islands/DrawingIsland/CalculatorDemo/App.xaml

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+<Application x:Class="CalculatorDemo.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             StartupUri="MainWindow.xaml">
+    <!-- 
+        We add the below ResourceDictionary to our Application's Merged
+        ResourceDictionaries so that our app will pick up the new styles.  The
+        pack URI
+        (https://learn.microsoft.com/en-us/dotnet/desktop/wpf/app-development/pack-uris-in-wpf)
+        below tells WPF to open the referenced assembly named
+        "PresentationFramework.Fluent.dll" and read a Xaml resource from it.
+    -->
+    <Application.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary 
+                    Source="pack://application:,,,/PresentationFramework.Fluent;component/Resources/Fluent.xaml" />
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </Application.Resources>
+</Application>

Samples/Islands/DrawingIsland/CalculatorDemo/CalculatorDemo.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <!-- WinAppSDK requires at least the 17763 build of windows, so we need to set that here.
+         You can set this in the Visual Studio project properties UI too. -->
+    <TargetFramework>net9.0-windows10.0.22621.0</TargetFramework>
+    <UseWpf>true</UseWpf>
+    <EnableDefaultItems>false</EnableDefaultItems>
+    <Platforms>x64;ARM64;x86</Platforms>
+
+    <!-- When adding a reference to WinAppSDK, we need to enable only the RIDs for the platforms WinAppSDK supprts. -->
+    <RuntimeIdentifiers>win-x64;win-x86;win-arm64</RuntimeIdentifiers>
+
+    <!-- These flags turn off some WinAppSDK features we won't be using. -->
+    <UseWinUITools>false</UseWinUITools>
+    <EnableCoreMrtTooling>false</EnableCoreMrtTooling>
+  </PropertyGroup>
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{5731865D-6685-47A7-8877-5DBAF39B54CD}</ProjectGuid>
+    <OutputType>WinExe</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>CalculatorDemo</RootNamespace>
+    <AssemblyName>CalculatorDemo</AssemblyName>
+    <FileAlignment>512</FileAlignment>
+    <WarningLevel>4</WarningLevel>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x86'">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>portable</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>portable</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>portable</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x86'">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <ApplicationDefinition Include="App.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </ApplicationDefinition>
+    <Page Include="MainWindow.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </Page>
+    <Compile Include="App.cs">
+      <DependentUpon>App.xaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
+    <Compile Include="MainWindow.cs">
+      <DependentUpon>MainWindow.xaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="MyTextBox.cs" />
+    <Compile Include="Properties\Resources.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DesignTime>True</DesignTime>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+    <Compile Include="Properties\Settings.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Settings.settings</DependentUpon>
+      <DesignTimeSharedInput>True</DesignTimeSharedInput>
+    </Compile>
+    <Compile Include="WpfIslandHost.cs" />
+    <EmbeddedResource Include="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
+    <None Include="Properties\Settings.settings">
+      <Generator>SettingsSingleFileGenerator</Generator>
+      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
+    </None>
+    <AppDesigner Include="Properties\" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Windows.CsWinRT" Version="2.0.7" />
+    <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.5.240428000" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\DrawingIslandCsProjection\DrawingIslandCsProjection.csproj" />
+  </ItemGroup>
+  <ItemGroup>
+    <Resource Include="appicon.ico" />
+  </ItemGroup>
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>