[C] fix BP declaration for Border (#8047)

- fixes #7744

src/Controls/src/Core/Border.cs

@@ -36,29 +36,29 @@ public Thickness Padding
 		}
 
 		public static readonly BindableProperty StrokeShapeProperty =
-			BindableProperty.Create(nameof(StrokeShape), typeof(IShape), typeof(Layout), null);
+			BindableProperty.Create(nameof(StrokeShape), typeof(IShape), typeof(Border), null);
 
 		public static readonly BindableProperty StrokeProperty =
-			BindableProperty.Create(nameof(Stroke), typeof(Brush), typeof(Layout), null);
+			BindableProperty.Create(nameof(Stroke), typeof(Brush), typeof(Border), null);
 
 		public static readonly BindableProperty StrokeThicknessProperty =
-			BindableProperty.Create(nameof(StrokeThickness), typeof(double), typeof(Layout), 1.0, propertyChanged: StrokeThicknessChanged);
+			BindableProperty.Create(nameof(StrokeThickness), typeof(double), typeof(Border), 1.0, propertyChanged: StrokeThicknessChanged);
 
 		public static readonly BindableProperty StrokeDashArrayProperty =
-			BindableProperty.Create(nameof(StrokeDashArray), typeof(DoubleCollection), typeof(Layout), null,
+			BindableProperty.Create(nameof(StrokeDashArray), typeof(DoubleCollection), typeof(Border), null,
 				defaultValueCreator: bindable => new DoubleCollection());
 
 		public static readonly BindableProperty StrokeDashOffsetProperty =
-			BindableProperty.Create(nameof(StrokeDashOffset), typeof(double), typeof(Layout), 0.0);
+			BindableProperty.Create(nameof(StrokeDashOffset), typeof(double), typeof(Border), 0.0);
 
 		public static readonly BindableProperty StrokeLineCapProperty =
-			BindableProperty.Create(nameof(StrokeLineCap), typeof(PenLineCap), typeof(Layout), PenLineCap.Flat);
+			BindableProperty.Create(nameof(StrokeLineCap), typeof(PenLineCap), typeof(Border), PenLineCap.Flat);
 
 		public static readonly BindableProperty StrokeLineJoinProperty =
-			BindableProperty.Create(nameof(StrokeLineJoin), typeof(PenLineJoin), typeof(Layout), PenLineJoin.Miter);
+			BindableProperty.Create(nameof(StrokeLineJoin), typeof(PenLineJoin), typeof(Border), PenLineJoin.Miter);
 
 		public static readonly BindableProperty StrokeMiterLimitProperty =
-			BindableProperty.Create(nameof(StrokeMiterLimit), typeof(double), typeof(Layout), 10.0);
+			BindableProperty.Create(nameof(StrokeMiterLimit), typeof(double), typeof(Border), 10.0);
 
 		[System.ComponentModel.TypeConverter(typeof(StrokeShapeTypeConverter))]
 		public IShape? StrokeShape

src/Controls/tests/Xaml.UnitTests/Issues/Maui7744.xaml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:local="clr-namespace:Microsoft.Maui.Controls.Xaml.UnitTests"
+             x:Class="Microsoft.Maui.Controls.Xaml.UnitTests.Maui7744">
+
+    <StackLayout>
+        <Border x:Name="border0" StrokeShape="RoundRectangle 1,1,1,1"/>
+        <Border x:Name="border1">
+            <Border.Style>
+                <Style TargetType="Border">
+                    <Setter Property="StrokeShape" Value="RoundRectangle 1,1,1,1"/>
+                </Style>
+            </Border.Style>
+        </Border>
+    </StackLayout>
+</ContentPage>

src/Controls/tests/Xaml.UnitTests/Issues/Maui7744.xaml.cs

@@ -0,0 +1,32 @@
+using Microsoft.Maui.ApplicationModel;
+using Microsoft.Maui.Controls.Core.UnitTests;
+using Microsoft.Maui.Controls.Shapes;
+using Microsoft.Maui.Devices;
+using NUnit.Framework;
+
+namespace Microsoft.Maui.Controls.Xaml.UnitTests
+{
+	public partial class Maui7744 : ContentPage
+	{
+		public Maui7744() => InitializeComponent();
+		public Maui7744(bool useCompiledXaml)
+		{
+			//this stub will be replaced at compile time
+		}
+
+		[TestFixture]
+		class Test
+		{
+			[SetUp] public void Setup() => AppInfo.SetCurrent(new MockAppInfo());
+			[TearDown] public void TearDown() => AppInfo.SetCurrent(null);
+
+			[Test]
+			public void ConvertersAreExecutedWhileApplyingSetter([Values(false, true)] bool useCompiledXaml)
+			{
+				var page = new Maui7744(useCompiledXaml);
+				Assert.That(page.border0.StrokeShape, Is.TypeOf<RoundRectangle>());
+				Assert.That(page.border1.StrokeShape, Is.TypeOf<RoundRectangle>());
+			}
+		}
+	}
+}