TheCodeTraveler · Oct 30, 2026 · Oct 30, 2026 · Oct 30, 2026 · Oct 30, 2026
diff --git a/.github/workflows/dotnet-build.yml b/.github/workflows/dotnet-build.yml
@@ -29,17 +29,19 @@ env:
   # Azure Pipelines' last preview package was 99.0.0-preview1416, so GitHub runs continue at 1417.
   # Keeping the number at four digits keeps SemVer's lexical ordering of `previewNNNN` correct.
   PreviewNumberOffset: 1416
-  NET_VERSION: '10.0.x'
+  # global.json pins the .NET 11 SDK, which builds everything; the unit tests also need the .NET 8, 9 and 10 runtimes
+  NET_VERSION: '11.0.x'
+  # .NET 11 is a release candidate until GA, and after GA the 'preview' feed stays on the last RC (as the 8.0, 9.0 and 10.0 feeds do), so switch to 'ga' together with global.json
+  NET_QUALITY: 'preview'
   PathToSolution: 'AsyncAwaitBestPractices.slnx'
   PathToSampleAppCsproj: 'sample/HackerNews.csproj'
   PathToUnitTestsCsproj: 'src/AsyncAwaitBestPractices.UnitTests/AsyncAwaitBestPractices.UnitTests.csproj'
   PathToAsyncAwaitBestPracticesCsproj: 'src/AsyncAwaitBestPractices/AsyncAwaitBestPractices.csproj'
   PathToAsyncAwaitBestPracticesMVVMCsproj: 'src/AsyncAwaitBestPractices.MVVM/AsyncAwaitBestPractices.MVVM.csproj'
-  Xcode_Version: 'latest-stable'
 
 jobs:
   build_sample:
-    name: Build .NET MAUI Sample App (${{ matrix.name }})
+    name: Build Blazor Sample App (${{ matrix.name }})
     runs-on: ${{ matrix.image }}
     timeout-minutes: 60
     strategy:
@@ -49,50 +51,31 @@ jobs:
           - name: Windows
             image: windows-latest
           - name: macOS
-            image: xcode-27
+            image: macos-latest
 
     steps:
       - name: Checkout
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
 
-      - name: Set Xcode v${{ env.Xcode_Version }}
-        if: runner.os == 'macOS'
-        uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90 # v1.7.0
-        with:
-          xcode-version: ${{ env.Xcode_Version }}
-
-      - name: Download iOS Platform
-        if: runner.os == 'macOS'
-        run: |
-          xcodebuild -downloadPlatform iOS
-
-          echo "Installed Simulator SDKs:"
-          xcodebuild -showsdks
-
       - name: Use .NET SDK v${{ env.NET_VERSION }}
         uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
         with:
           dotnet-version: ${{ env.NET_VERSION }}
-          dotnet-quality: 'ga'
+          dotnet-quality: ${{ env.NET_QUALITY }}
 
-      - name: Install .NET MAUI Workload
+      - name: Build Sample App
         shell: bash
-        run: |
-          dotnet workload install maui
-          dotnet workload update
+        run: dotnet build "$PathToSampleAppCsproj"
 
-      - name: Build Sample App
+      # bash on GitHub runners runs with pipefail, so a failing `dotnet list` fails the step
+      - name: Check Sample App Dependencies Vulnerabilities
+        if: ${{ !cancelled() }}
         shell: bash
         run: |
-          if [ "$RUNNER_OS" = "macOS" ]; then
-            # HackerNews.csproj builds iOS for a device (ios-arm64), which requires code signing by default.
-            # This workflow has no Apple certificate or provisioning profile, so the macOS build skips code signing.
-            dotnet build "$PathToSampleAppCsproj" -p:EnableCodeSigning=false
-          else
-            dotnet build "$PathToSampleAppCsproj"
-          fi
+          dotnet list "$PathToSampleAppCsproj" package --vulnerable --include-transitive | tee "$RUNNER_TEMP/vulnerable-packages.txt"
+          if grep -q 'has the following vulnerable packages' "$RUNNER_TEMP/vulnerable-packages.txt"; then exit 1; fi
 
   build_test_library:
     name: Build + Test Library
@@ -124,15 +107,22 @@ jobs:
           "NugetPackageVersion=$nugetPackageVersion" >> $env:GITHUB_ENV
           "NuGet Package Version: ``$nugetPackageVersion``" >> $env:GITHUB_STEP_SUMMARY
 
-      - name: Use .NET SDKs 8.0.x, 9.0.x, ${{ env.NET_VERSION }}
+      # The unit tests run on these three runtimes; each SDK brings its runtime
+      - name: Use .NET SDKs 8.0.x, 9.0.x, 10.0.x
         uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
         with:
           dotnet-version: |
             8.0.x
             9.0.x
-            ${{ env.NET_VERSION }}
+            10.0.x
           dotnet-quality: 'ga'
 
+      - name: Use .NET SDK v${{ env.NET_VERSION }}
+        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
+        with:
+          dotnet-version: ${{ env.NET_VERSION }}
+          dotnet-quality: ${{ env.NET_QUALITY }}
+
       - name: Run UnitTests
         run: dotnet test $env:PathToUnitTestsCsproj -c Release --settings ".runsettings" --collect "code coverage" --logger trx --results-directory "$env:RUNNER_TEMP"
 
@@ -196,13 +186,6 @@ jobs:
           if ($output -cmatch 'has the following vulnerable packages') { exit 1 }
           exit 0
 
-      - name: Check Sample App Dependencies Vulnerabilities
-        if: ${{ !cancelled() }}
-        run: |
-          dotnet list $env:PathToSampleAppCsproj package --vulnerable --include-transitive | Tee-Object -Variable output
-          if ($output -cmatch 'has the following vulnerable packages') { exit 1 }
-          exit 0
-
       - name: Copy NuGet Packages to Staging Directory
         if: ${{ !startsWith(github.ref, 'refs/tags/') }}
         run: |

diff --git a/.github/workflows/dotnet-format-daily.yml b/.github/workflows/dotnet-format-daily.yml
@@ -14,18 +14,9 @@ jobs:
       - name: Install .NET SDK
         uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
         with:
-          dotnet-version: '10.0.x'
-          dotnet-quality: 'ga'
-
-      - uses: actions/setup-java@de7274f081f381c8f8158605e0321c36c376e2e6 # v6.0.1
-        with:
-          distribution: 'microsoft'
-          java-version: '21'
-
-      - name: Install .NET MAUI Workload
-        run: |
-          dotnet workload install maui
-          dotnet workload update
+          dotnet-version: '11.0.x'
+          # .NET 11 is a release candidate until GA, and after GA the 'preview' feed stays on the last RC (as the 8.0, 9.0 and 10.0 feeds do), so switch to 'ga' together with global.json
+          dotnet-quality: 'preview'
 
       - name: Build solution
         run: dotnet build AsyncAwaitBestPractices.slnx
@@ -34,8 +25,10 @@ jobs:
       # Roslyn's "Add [Obsolete]" code fix, which adds the [Obsolete] attribute to every member that
       # uses or overrides an obsolete API (see https://github.com/dotnet/format/issues/1230).
       # Excluding them here only affects `dotnet format`; `dotnet build` still reports these warnings.
+      # The Bad page is excluded because it is the starting point of the talk's live coding,
+      # and `dotnet format` would apply the CA2016 code fix to it.
       - name: Run dotnet format
-        run: dotnet format samples/CommunityToolkit.Maui.Sample.slnx --exclude-diagnostics CS0612 CS0618 CS0672 CS1062 CS1064
+        run: dotnet format AsyncAwaitBestPractices.slnx --exclude-diagnostics CS0612 CS0618 CS0672 CS1062 CS1064 --exclude sample/Components/Pages/NewsPage_BadAsyncAwaitPractices.cs
 
       - name: Check for changes
         id: format

diff --git a/AsyncAwaitBestPractices.slnx b/AsyncAwaitBestPractices.slnx
@@ -1,16 +1,13 @@
 <Solution>
   <Configurations>
     <Platform Name="Any CPU" />
-    <Platform Name="iPhone" />
-    <Platform Name="iPhoneSimulator" />
   </Configurations>
   <Folder Name="/Sample/">
     <Project Path="sample/HackerNews.csproj" />
   </Folder>
   <Folder Name="/Solution Items/">
     <File Path=".editorconfig" />
     <File Path="Directory.Build.props" />
-    <File Path="Directory.Build.targets" />
     <File Path="global.json" />
   </Folder>
   <Folder Name="/Tests/">

diff --git a/Directory.Build.props b/Directory.Build.props
@@ -11,12 +11,6 @@
     <AccelerateBuildsInVisualStudio>true</AccelerateBuildsInVisualStudio>
     <GenerateErrorForMissingTargetingPacks>false</GenerateErrorForMissingTargetingPacks>
 
-    <!-- MAUI Specific -->
-    <MauiPackageVersion>10.0.0</MauiPackageVersion>
-    <MauiStrictXamlCompilation>true</MauiStrictXamlCompilation>
-    <SkipValidateMauiImplicitPackageReferences>true</SkipValidateMauiImplicitPackageReferences>
-    <MauiEnableXamlCBindingWithSourceCompilation>true</MauiEnableXamlCBindingWithSourceCompilation>
-
     <!-- Prevent NuGet Pacakge Vulnerabilities -->
     <NuGetAudit>enable</NuGetAudit>
     <NuGetAuditMode>all</NuGetAuditMode>
@@ -48,10 +42,6 @@
      CS1712: Type parameter has no matching typeparam tag in the XML comment
      CS1723: XML comment has cref attribute that refers to a type parameter
      CS1734: XML comment has a paramref tag, but there is no parameter by that name
-     CsWinRT1028: Class implements WinRT interfaces but isn't marked partial
-     CsWinRT1030: Class implements WinRT interfaces that require unsafe code
-     XC0045: Binding: Property not found
-     XC0103: Consider attributing the markup extension with [RequireService] or [AcceptEmptyServiceProvider] if it doesn't require any
      NU1900	Error communicating with package source, while getting vulnerability information.
      NU1901	Package with low severity detected
      NU1902	Package with moderate severity detected
@@ -64,8 +54,6 @@
     <WarningsAsErrors>
       nullable,
       CS0419,CS0618,CS1570,CS1571,CS1572,CS1573,CS1574,CS1580,CS1581,CS1584,CS1587,CS1589,CS1590,CS1591,CS1592,CS1598,CS1658,CS1710,CS1711,CS1712,CS1723,CS1734,
-      CsWinRT1028,CsWinRT1030,
-      XC0045,XC0103,
       NU1900,NU1901,NU1902,NU1903,NU1904,NU1905,
       NUnit1001,NUnit1002,NUnit1003,NUnit1004,NUnit1005,NUnit1006,NUnit1007,NUnit1008,NUnit1009,NUnit1010,NUnit1011,NUnit1012,NUnit1013,NUnit1014,NUnit1015,NUnit1016,NUnit1017,NUnit1018,NUnit1019,NUnit1020,NUnit1021,NUnit1022,NUnit1023,NUnit1024,NUnit1025,NUnit1026,NUnit1027,NUnit1028,NUnit1029,NUnit1030,NUnit1031,NUnit1032,NUnit1033,
       NUnit2001,NUnit2002,NUnit2003,NUnit2004,NUnit2005,NUnit2006,NUnit2007,NUnit2008,NUnit2009,NUnit2010,NUnit2011,NUnit2012,NUnit2013,NUnit2014,NUnit2015,NUnit2016,NUnit2017,NUnit2018,NUnit2019,NUnit2020,NUnit2021,NUnit2022,NUnit2023,NUnit2024,NUnit2025,NUnit2026,NUnit2027,NUnit2028,NUnit2029,NUnit2030,NUnit2031,NUnit2032,NUnit2033,

diff --git a/Directory.Build.targets b/Directory.Build.targets
diff --git a/global.json b/global.json
@@ -1,7 +1,7 @@
 {
   "sdk": {
-    "version": "10.0.402",
+    "version": "11.0.100-rc.3.26522.148",
     "rollForward": "latestFeature",
-    "allowPrerelease": false
+    "allowPrerelease": true
   }
 }
diff --git a/sample/App.cs b/sample/App.cs
diff --git a/sample/AppShell.cs b/sample/AppShell.cs
diff --git a/sample/Components/App.razor b/sample/Components/App.razor
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <base href="/" />
+    @* An empty icon stops the browser from requesting /favicon.ico, which this app does not serve *@
+    <link rel="icon" href="data:," />
+    <link rel="stylesheet" href="app.css" />
+    <HeadOutlet @rendermode="InteractiveServer" />
+</head>
+
+<body>
+    @* No prerendering: each page initializes once, on the browser tab's circuit, where the talk's SynchronizationContext rules apply. Prerendering would run OnInitialized twice. *@
+    <Routes @rendermode="new InteractiveServerRenderMode(prerender: false)" />
+    <script src="_framework/blazor.web.js"></script>
+</body>
+
+</html>
diff --git a/sample/Components/Layout/MainLayout.razor b/sample/Components/Layout/MainLayout.razor
@@ -0,0 +1,22 @@
+@inherits LayoutComponentBase
+@using System.Runtime.InteropServices
+
+<div class="demo-bar">
+    <nav class="demo-links" aria-label="Sample versions">
+        <NavLink class="demo-link" href="" Match="NavLinkMatch.All">Bad async/await</NavLink>
+        <NavLink class="demo-link" href="good" Match="NavLinkMatch.All">Good async/await</NavLink>
+    </nav>
+
+    <span class="demo-runtime">@RuntimeInformation.FrameworkDescription · Runtime async: <strong>@(RuntimeAsyncStatus.IsEnabled ? "on" : "off")</strong></span>
+</div>
+
+<main class="app-pane">
+    @Body
+</main>
+
+<div id="blazor-error-ui" data-nosnippet>
+    An unhandled error has occurred.
+    <a href="." class="reload">Reload</a>
+    @* Unlike the template's span, a button can be reached and pressed from the keyboard; blazor.web.js finds it by the dismiss class, whatever the element *@
+    <button type="button" class="dismiss" aria-label="Dismiss">&#x1F5D9;</button>
+</div>
diff --git a/sample/Components/Pages/Error.razor b/sample/Components/Pages/Error.razor
@@ -0,0 +1,8 @@
+@page "/Error"
+
+<PageTitle>Refresh Failed</PageTitle>
+
+<section class="error-panel">
+    <h1>Refresh failed</h1>
+    <p>The app hit an unexpected error while loading Hacker News.</p>
+</section>