Update the MAUI sample to use a label instead of a modal alert

Directory.Build.targets

@@ -15,10 +15,25 @@
     <PublicSign>false</PublicSign>
   </PropertyGroup>
 
-  <PropertyGroup>
-    <SupportedOSPlatformVersion Condition=" '$(TargetPlatformIdentifier)' == 'iOS' ">12.0</SupportedOSPlatformVersion>
-    <SupportedOSPlatformVersion Condition=" '$(TargetPlatformIdentifier)' == 'Windows' ">7.0</SupportedOSPlatformVersion>
-    <TargetPlatformMinVersion   Condition=" '$(TargetPlatformIdentifier)' == 'Windows' ">7.0</TargetPlatformMinVersion>
+  <PropertyGroup
+    Condition=" ('$(TargetFrameworkIdentifier)' == '.NETCoreApp' And $([MSBuild]::VersionGreaterThanOrEquals($(TargetFrameworkVersion), '5.0')) And
+                 '$(TargetPlatformIdentifier)'  == 'iOS'         And '$(TargetPlatformVersion)' != '' And
+                  $([MSBuild]::VersionGreaterThanOrEquals($(TargetPlatformVersion), '12.0'))) ">
+    <SupportedOSPlatformVersion>12.0</SupportedOSPlatformVersion>
+  </PropertyGroup>
+
+  <PropertyGroup
+    Condition=" ('$(TargetFrameworkIdentifier)' == '.NETCoreApp' And $([MSBuild]::VersionGreaterThanOrEquals($(TargetFrameworkVersion), '5.0')) And
+                 '$(TargetPlatformIdentifier)'  == 'Windows'     And '$(TargetPlatformVersion)' != '' And
+                  $([MSBuild]::VersionEquals($(TargetPlatformVersion), '7.0'))) ">
+    <SupportedOSPlatformVersion>7.0</SupportedOSPlatformVersion>
+  </PropertyGroup>
+
+  <PropertyGroup
+    Condition=" ('$(TargetFrameworkIdentifier)' == '.NETCoreApp' And $([MSBuild]::VersionGreaterThanOrEquals($(TargetFrameworkVersion), '5.0')) And
+                 '$(TargetPlatformIdentifier)'  == 'Windows'     And '$(TargetPlatformVersion)' != '' And
+                  $([MSBuild]::VersionGreaterThanOrEquals($(TargetPlatformVersion), '10.0.17763'))) ">
+    <SupportedOSPlatformVersion>10.0.17763</SupportedOSPlatformVersion>
   </PropertyGroup>
 
   <!--

sandbox/OpenIddict.Sandbox.Maui.Client/MainPage.xaml

@@ -2,7 +2,7 @@
 <ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
              x:Class="OpenIddict.Sandbox.Maui.Client.MainPage">
-			 
+
     <ScrollView>
         <VerticalStackLayout 
             Spacing="25" 
@@ -14,14 +14,15 @@
                 SemanticProperties.Description="Cute dot net bot waving hi to you!"
                 HeightRequest="200"
                 HorizontalOptions="Center" />
-                
+
             <Label
                 Text="Hello, World!"
                 SemanticProperties.HeadingLevel="Level1"
                 FontSize="32"
                 HorizontalOptions="Center" />
-            
+
             <Label
+                x:Name="Message"
                 Text="Welcome to .NET Multi-platform App UI"
                 SemanticProperties.HeadingLevel="Level2"
                 SemanticProperties.Description="Welcome to dot net Multi platform App U I"
@@ -58,5 +59,5 @@
 
         </VerticalStackLayout>
     </ScrollView>
- 
+
 </ContentPage>

sandbox/OpenIddict.Sandbox.Maui.Client/MainPage.xaml.cs

@@ -58,25 +58,26 @@ public partial class MainPage : ContentPage
                 // Wait for the user to complete the authorization process.
                 var principal = (await _service.AuthenticateInteractivelyAsync(new()
                 {
+                    CancellationToken = source.Token,
                     Nonce = result.Nonce
                 })).Principal;
 
-                await DisplayAlert("Authentication successful", $"Welcome, {principal.FindFirst(Claims.Name)!.Value}.", "OK");
+                Message.Text = $"Welcome, {principal.FindFirst(Claims.Name)!.Value}.";
             }
 
             catch (OperationCanceledException)
             {
-                await DisplayAlert("Authentication timed out", "The authentication process was aborted.", "OK");
+                Message.Text = "The authentication process was aborted.";
             }
 
             catch (ProtocolException exception) when (exception.Error is Errors.AccessDenied)
             {
-                await DisplayAlert("Authorization denied", "The authorization was denied by the end user.", "OK");
+                Message.Text = "The authorization was denied by the end user.";
             }
 
             catch
             {
-                await DisplayAlert("Authentication failed", "An error occurred while trying to authenticate the user.", "OK");
+                Message.Text = "An error occurred while trying to authenticate the user.";
             }
         }
 
@@ -122,17 +123,17 @@ public partial class MainPage : ContentPage
                     Nonce = result.Nonce
                 });
 
-                await DisplayAlert("Logout demand successful", "The user was successfully logged out from the local server.", "OK");
+                Message.Text = "The user was successfully logged out from the local server.";
             }
 
             catch (OperationCanceledException)
             {
-                await DisplayAlert("Logout timed out", "The logout process was aborted.", "OK");
+                Message.Text = "The logout process was aborted.";
             }
 
             catch
             {
-                await DisplayAlert("Logout failed", "An error occurred while trying to log the user out.", "OK");
+                Message.Text = "An error occurred while trying to log the user out.";
             }
         }