fix: Downgrade to 10.0.22621 for Build Tools compatibility

src/Uno.Sdk/ReadMe.md

@@ -18,7 +18,7 @@ The Uno.Sdk powers the Uno Platform Single Project, including the ability to imp
 | SkiaSharpVersion | 2.88.9-preview.2.2 |
 | SvgSkiaVersion | 2.0.0.2 |
 | WinAppSdkVersion | 1.6.241114003 |
-| WinAppSdkBuildToolsVersion | 10.0.26100.1742 |
+| WinAppSdkBuildToolsVersion | 10.0.22621.1742 |
 | MicrosoftLoggingVersion** | 8.0.1 |
 | WindowsCompatibilityVersion** | 8.0.11 |
 | MicrosoftIdentityClientVersion | 4.66.2 |
@@ -162,7 +162,7 @@ The Uno.Sdk powers the Uno Platform Single Project, including the ability to imp
   },
   {
     "group": "WinAppSdkBuildTools",
-    "version": "10.0.26100.1742",
+    "version": "10.0.22621.1742",
     "packages": [
       "Microsoft.Windows.SDK.BuildTools"
     ]

src/Uno.Sdk/packages.json

@@ -121,7 +121,7 @@
   },
   {
     "group": "WinAppSdkBuildTools",
-    "version": "10.0.26100.1742",
+    "version": "10.0.22621.3233",
     "packages": [
       "Microsoft.Windows.SDK.BuildTools"
     ]
@@ -316,4 +316,4 @@
       "Uno.Cupertino.WinUI"
     ]
   }
-]
+]

src/Uno.Templates/content/unoapp/.run/MyExtensionsApp.1.run.xml

@@ -51,7 +51,7 @@
   <!--#if (useWinAppSdk)-->
   <configuration default="false" name="MyExtensionsApp.1 (WinAppSDK Unpackaged)" type="LaunchSettings" factoryName=".NET Launch Settings Profile">
     <option name="LAUNCH_PROFILE_PROJECT_FILE_PATH" value="$PROJECT_DIR$/MyExtensionsApp.1/MyExtensionsApp.1.csproj" />
-    <option name="LAUNCH_PROFILE_TFM" value="$baseTargetFramework$-windows10.0.26100.0" />
+    <option name="LAUNCH_PROFILE_TFM" value="$baseTargetFramework$-windows10.0.22621.0" />
     <option name="LAUNCH_PROFILE_NAME" value="MyExtensionsApp.1 (WinAppSDK Unpackaged)" />
     <option name="USE_EXTERNAL_CONSOLE" value="0" />
     <option name="USE_MONO" value="0" />

src/Uno.Templates/content/unoapp/MyExtensionsApp.1.MauiControls/MyExtensionsApp.1.MauiControls.csproj

@@ -8,7 +8,7 @@
 
     <!--#endif-->
     <!--#if (useWinAppSdk)-->
-    <TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows')) or '$(EnableWindowsTargeting)' == 'true'">$baseTargetFramework$-windows10.0.26100</TargetFrameworks>
+    <TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows')) or '$(EnableWindowsTargeting)' == 'true'">$baseTargetFramework$-windows10.0.22621</TargetFrameworks>
     <!--#endif-->
     <TargetFrameworks>
       $baseTargetFramework$;

src/Uno.Templates/content/unolib/CrossTargetedLibrary.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Uno.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>$baseTargetFramework$;$baseTargetFramework$-ios;$baseTargetFramework$-maccatalyst;$baseTargetFramework$-android;$baseTargetFramework$-windows10.0.26100;$baseTargetFramework$-browserwasm;$baseTargetFramework$-desktop</TargetFrameworks>
+    <TargetFrameworks>$baseTargetFramework$;$baseTargetFramework$-ios;$baseTargetFramework$-maccatalyst;$baseTargetFramework$-android;$baseTargetFramework$-windows10.0.22621;$baseTargetFramework$-browserwasm;$baseTargetFramework$-desktop</TargetFrameworks>
     <UnoSingleProject>true</UnoSingleProject>
     <OutputType>Library</OutputType>
     <!-- Ensures the .xr.xml files are generated in a proper layout folder -->

tools/TemplateTfmSwitchGenerator/Program.cs

@@ -9,7 +9,7 @@
     new Platform("platforms == android", "platforms != android", "android"),
     new Platform("platforms == ios", "platforms != ios", "ios"),
     new Platform("platforms == maccatalyst", "platforms != maccatalyst", "maccatalyst"),
-    new Platform("platforms == windows", "platforms != windows", "windows10.0.26100"),
+    new Platform("platforms == windows", "platforms != windows", "windows10.0.22621"),
     new Platform("platforms == wasm", "platforms != wasm", "browserwasm"),
     new Platform("platforms == desktop", "platforms != desktop", "desktop"),
     new Platform("useUnitTests == true", "useUnitTests == false", null)

tools/Uno.Sdk.Updater/Program.cs

@@ -1,3 +1,4 @@
+using System.Globalization;
 using System.IO.Compression;
 using System.Text;
 using System.Text.Json;
@@ -296,7 +297,13 @@ static async Task<ManifestGroup> UpdateGroup(ManifestGroup group, NuGetVersion u
         // Skip Maui on Release branch to avoid AndroidX package misalignment
         || (!unoVersion.IsPreview && group.Group == "Maui"))
     {
-        Console.WriteLine("Leaving group as is: " + group.Group);
+        Console.WriteLine("Skipping " + group.Group + " to avoid Java misalignment.");
+        return group;
+    }
+    // Skip WinAppSdkBuildTools group due to https://github.com/unoplatform/uno/issues/18840
+    else if (string.Equals(group.Group, "WinAppSdkBuildTools", StringComparison.InvariantCultureIgnoreCase))
+    {
+        Console.WriteLine("Skipping " + group.Group + "to avoid issues caused by https://github.com/unoplatform/uno/issues/18840");
         return group;
     }