fix build issues

Author: vgromfeld

Microsoft.Toolkit.Uwp.SampleApp/Microsoft.Toolkit.Uwp.SampleApp.csproj

@@ -977,6 +977,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="SamplePages\CanvasPathGeometry\CanvasPathGeometryPage.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Content Include="SamplePages\Primitives\SwitchPresenter.bind">
       <SubType>Designer</SubType>
     </Content>

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/MetadataControl/MetadataControlPage.xaml.cs

@@ -2,11 +2,11 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System;
+using System.Collections.ObjectModel;
 using Microsoft.Toolkit.Uwp.SampleApp.Common;
 using Microsoft.Toolkit.Uwp.UI;
 using Microsoft.Toolkit.Uwp.UI.Controls;
-using System;
-using System.Collections.ObjectModel;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;