Small fixes for the notifications lib, targetting a new SDK.

Author: azchohfi

Microsoft.Toolkit.Uwp.Notifications/Microsoft.Toolkit.Uwp.Notifications.csproj

@@ -18,10 +18,10 @@
   <Choose>
 
     <!--Desktop Win32 apps-->
-    <When Condition="'$(TargetFramework)'=='net461' or '$(TargetFramework)'=='netcoreapp3.0'">
+    <When Condition="'$(TargetFramework)'=='net461' or '$(TargetFramework)'=='netcoreapp3.1'">
       <ItemGroup>
         <!--Reference Windows SDK NuGet of correct target platform version-->
-        <PackageReference Include="Microsoft.Windows.SDK.Contracts" Version="10.0.17763.1000" />
+        <PackageReference Include="Microsoft.Windows.SDK.Contracts" Version="10.0.19041.1" />
       </ItemGroup>
       <PropertyGroup>
         <!--Define the WINDOWS_UWP conditional symbol, since the Windows.Data.Xml and the Windows.UI.Notification namespaces are available-->
@@ -40,7 +40,7 @@
   </Choose>
 
   <!--NET Core desktop apps also need the Registry NuGet package-->
-  <ItemGroup Condition="'$(TargetFramework)'=='netcoreapp3.0'">
+  <ItemGroup Condition="'$(TargetFramework)'=='netcoreapp3.1'">
     <PackageReference Include="Microsoft.Win32.Registry" Version="4.7.0" />
   </ItemGroup>
 

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/WeatherLiveTileAndToast/WeatherLiveTileAndToastCode.bind

@@ -121,9 +121,10 @@ private static bool IsAdaptiveToastSupported()
 {
     switch (AnalyticsInfo.VersionInfo.DeviceFamily)
     {
+        // Desktop and Mobile started supporting adaptive toasts in API contract 3 (Anniversary Update)	
         case "Windows.Mobile":
         case "Windows.Desktop":
-            return true;
+            return ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 3);
 
         // Other device families do not support adaptive toasts
         default: