demo-xf-app-1a/MobileApp1/MobileApp1.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <ProduceReferenceAssembly>true</ProduceReferenceAssembly>
  </PropertyGroup>

  <ItemGroup>
    <Compile Remove="AppShell.xaml.cs" />
    <Compile Remove="Helpers\ThreadHelper.cs" />
    <Compile Remove="Services\IDataStore.cs" />
    <Compile Remove="Services\MockDataStore.cs" />
    <Compile Remove="Views\ItemDetailPage.xaml.cs" />
    <Compile Remove="Views\ItemsPage.xaml.cs" />
    <Compile Remove="Views\LoginPage1.xaml.cs" />
    <Compile Remove="Views\MainPageDetail.xaml.cs" />
    <Compile Remove="Views\MainPageFlyout.xaml.cs" />
    <Compile Remove="Views\MainPageFlyoutMenuItem.cs" />
    <Compile Remove="Views\NewItemPage.xaml.cs" />
  </ItemGroup>

  <ItemGroup>
    <EmbeddedResource Remove="AppShell.xaml" />
    <EmbeddedResource Remove="Views\ItemDetailPage.xaml" />
    <EmbeddedResource Remove="Views\ItemsPage.xaml" />
    <EmbeddedResource Remove="Views\LoginPage1.xaml" />
    <EmbeddedResource Remove="Views\MainPageDetail.xaml" />
    <EmbeddedResource Remove="Views\MainPageFlyout.xaml" />
    <EmbeddedResource Remove="Views\NewItemPage.xaml" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Xamarin.Forms" Version="5.0.0.2012" />  
    <PackageReference Include="Xamarin.Essentials" Version="1.6.1" />
  </ItemGroup>

  <ItemGroup>
    <Compile Update="Views\Content\LoadingIndicatorView.xaml.cs">
      <DependentUpon>LoadingIndicatorView.xaml</DependentUpon>
    </Compile>
    <Compile Update="Views\Content\CompanyHeaderView.xaml.cs">
      <DependentUpon>CompanyHeaderView.xaml</DependentUpon>
    </Compile>
    <Compile Update="Views\BlankPage.xaml.cs">
      <DependentUpon>BlankPage.xaml</DependentUpon>
    </Compile>
    <Compile Update="Views\PasswordResetPage.xaml.cs">
      <DependentUpon>PasswordResetPage.xaml</DependentUpon>
    </Compile>
    <Compile Update="Views\Content\Login\AboutView.xaml.cs">
      <DependentUpon>AboutView.xaml</DependentUpon>
    </Compile>
    <Compile Update="Views\Content\Login\PasswordResetView.xaml.cs">
      <DependentUpon>PasswordResetView.xaml</DependentUpon>
    </Compile>
    <Compile Update="Views\LoginPage.xaml.cs">
      <DependentUpon>LoginPage.xaml</DependentUpon>
    </Compile>
    <Compile Update="Views\Content\Login\LoginView.xaml.cs">
      <DependentUpon>LoginView.xaml</DependentUpon>
    </Compile>
  </ItemGroup>

  <ItemGroup>
    <EmbeddedResource Update="Views\FlyoutMenuPage.xaml">
      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
    </EmbeddedResource>
    <EmbeddedResource Update="Views\LoginPage.xaml">
      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
    </EmbeddedResource>
    <EmbeddedResource Update="Views\Content\Login\LoginView.xaml">
      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
    </EmbeddedResource>
    <EmbeddedResource Update="Views\MainPage.xaml">
      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
    </EmbeddedResource>
  </ItemGroup>
</Project>