diff --git a/.github/workflows/build-samples-todoapp-tutorial.yml b/.github/workflows/build-samples-todoapp-tutorial.yml
index ad553c2..8e9435a 100644
--- a/.github/workflows/build-samples-todoapp-tutorial.yml
+++ b/.github/workflows/build-samples-todoapp-tutorial.yml
@@ -8,17 +8,16 @@ env:
   DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 1
   DOTNET_NOLOGO: true
   DOTNET_CONFIGURATION: 'Release'
-  # NOTE: This sample's solution (todoapp.sln) also contains ClientApp, a WPF project
-  # targeting net10.0-windows. That head requires a windows-latest runner and is tracked
-  # separately in https://github.com/CommunityToolkit/Datasync/issues/510 (Phase 2). Only
-  # ServerApp (net10.0) is built here.
-  ProjectFile: 'samples/todoapp-tutorial/ServerApp/ServerApp.csproj'
+  ServerProjectFile: 'samples/todoapp-tutorial/ServerApp/ServerApp.csproj'
+  # ClientApp is a WPF project targeting net10.0-windows, so it is built on a windows-latest
+  # runner in a separate job below. See https://github.com/CommunityToolkit/Datasync/issues/510.
+  ClientProjectFile: 'samples/todoapp-tutorial/ClientApp/ClientApp.csproj'
 
 permissions:
   contents: read
 
 jobs:
-  build:
+  build-serverapp:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Repository
@@ -30,10 +29,30 @@ jobs:
           dotnet-version: ${{ env.DOTNET_VERSION }}
 
       - name: Restore dependencies
-        run: dotnet restore ${{ env.ProjectFile }}
+        run: dotnet restore ${{ env.ServerProjectFile }}
 
       - name: Build sample
         run: >
-          dotnet build ${{ env.ProjectFile }}
+          dotnet build ${{ env.ServerProjectFile }}
+          --configuration ${{ env.DOTNET_CONFIGURATION }}
+          --no-restore
+
+  build-clientapp:
+    runs-on: windows-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v7
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v5
+        with:
+          dotnet-version: ${{ env.DOTNET_VERSION }}
+
+      - name: Restore dependencies
+        run: dotnet restore ${{ env.ClientProjectFile }}
+
+      - name: Build sample
+        run: >
+          dotnet build ${{ env.ClientProjectFile }}
           --configuration ${{ env.DOTNET_CONFIGURATION }}
           --no-restore
diff --git a/.github/workflows/build-samples-todoapp-windows.yml b/.github/workflows/build-samples-todoapp-windows.yml
new file mode 100644
index 0000000..73fba07
--- /dev/null
+++ b/.github/workflows/build-samples-todoapp-windows.yml
@@ -0,0 +1,69 @@
+name: Build Sample - TodoApp Windows (WinUI3 / WPF / MAUI)
+
+on:
+  workflow_call:
+
+env:
+  DOTNET_VERSION: '10.0.x'
+  DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 1
+  DOTNET_NOLOGO: true
+  DOTNET_CONFIGURATION: 'Release'
+  # WinUI3 declares <Platforms>x86;x64;ARM64</Platforms> with no AnyCPU, so Platform must be
+  # specified explicitly - the CLI default of AnyCPU is not a valid configuration for this project.
+  WinUI3ProjectFile: 'samples/todoapp/TodoApp.WinUI3/TodoApp.WinUI3.csproj'
+  WpfProjectFile: 'samples/todoapp/TodoApp.WPF/TodoApp.WPF.csproj'
+  # TodoApp.MAUI.csproj targets net10.0-android;net10.0-ios, with net10.0-windows10.0.19041.0
+  # conditionally appended only when building on Windows. Android/iOS heads require separate
+  # workloads and are tracked in https://github.com/CommunityToolkit/Datasync/issues/511 (Phase 3),
+  # so restore/build here is explicitly scoped to the Windows TargetFramework only.
+  MauiProjectFile: 'samples/todoapp/TodoApp.MAUI/TodoApp.MAUI.csproj'
+  MauiWindowsTargetFramework: 'net10.0-windows10.0.19041.0'
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: windows-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v7
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v5
+        with:
+          dotnet-version: ${{ env.DOTNET_VERSION }}
+
+      - name: Restore WinUI3 project
+        run: dotnet restore ${{ env.WinUI3ProjectFile }} -p:Platform=x64
+
+      - name: Build WinUI3 project
+        run: >
+          dotnet build ${{ env.WinUI3ProjectFile }}
+          --configuration ${{ env.DOTNET_CONFIGURATION }}
+          -p:Platform=x64
+          --no-restore
+
+      - name: Restore WPF project
+        run: dotnet restore ${{ env.WpfProjectFile }}
+
+      - name: Build WPF project
+        run: >
+          dotnet build ${{ env.WpfProjectFile }}
+          --configuration ${{ env.DOTNET_CONFIGURATION }}
+          --no-restore
+
+      - name: Install MAUI Windows workload
+        run: dotnet workload install maui-windows
+
+      - name: Restore MAUI project (Windows TFM only)
+        # NOTE: 'dotnet restore' has no -f|--framework option (-f means --force there, unlike
+        # 'dotnet build'). Use the MSBuild property directly to scope restore to one TFM.
+        run: dotnet restore ${{ env.MauiProjectFile }} -p:TargetFramework=${{ env.MauiWindowsTargetFramework }}
+
+      - name: Build MAUI project (Windows TFM only)
+        run: >
+          dotnet build ${{ env.MauiProjectFile }}
+          -f ${{ env.MauiWindowsTargetFramework }}
+          --configuration ${{ env.DOTNET_CONFIGURATION }}
+          --no-restore
diff --git a/.github/workflows/build-samples.yml b/.github/workflows/build-samples.yml
index bc07f02..31faae6 100644
--- a/.github/workflows/build-samples.yml
+++ b/.github/workflows/build-samples.yml
@@ -31,9 +31,12 @@ jobs:
   todoapp-avalonia:
     uses: ./.github/workflows/build-samples-todoapp-avalonia.yml
 
+  todoapp-windows:
+    uses: ./.github/workflows/build-samples-todoapp-windows.yml
+
   # Single aggregation point so branch protection only needs to require one check,
-  # regardless of how many sample workflows are added over time (see Phase 2/3
-  # follow-ups: https://github.com/CommunityToolkit/Datasync/issues/510 and #511).
+  # regardless of how many sample workflows are added over time (see Phase 3
+  # follow-up: https://github.com/CommunityToolkit/Datasync/issues/511).
   all-samples-built:
     name: All samples built
     if: always()
@@ -44,6 +47,7 @@ jobs:
       - todoapp-blazor-wasm
       - todoapp-tutorial
       - todoapp-avalonia
+      - todoapp-windows
     runs-on: ubuntu-latest
     steps:
       - name: Check sample build results
diff --git a/samples/todoapp/TodoApp.WinUI3/TodoApp.WinUI3.csproj b/samples/todoapp/TodoApp.WinUI3/TodoApp.WinUI3.csproj
index 890eaff..b72dafe 100644
--- a/samples/todoapp/TodoApp.WinUI3/TodoApp.WinUI3.csproj
+++ b/samples/todoapp/TodoApp.WinUI3/TodoApp.WinUI3.csproj
@@ -7,7 +7,6 @@
     <ApplicationManifest>app.manifest</ApplicationManifest>
     <Platforms>x86;x64;ARM64</Platforms>
     <RuntimeIdentifiers>win-x86;win-x64;win-arm64</RuntimeIdentifiers>
-    <PublishProfile>win-$(Platform).pubxml</PublishProfile>
     <UseWinUI>true</UseWinUI>
     <EnableMsixTooling>true</EnableMsixTooling>
     <LangVersion>preview</LangVersion>