fix: .NET Native Support (#1937)

Author: worldbeater

src/ReactiveUI/Platforms/uap10.0.16299/ReactiveUI.rd.xml

@@ -0,0 +1,8 @@
+<Directives xmlns="http://schemas.microsoft.com/netfx/2013/01/metadata">
+  <Library Name="ReactiveUI">
+    <Assembly Name="ReactiveUI" Activate="Required All" Browse="Required All" Serialize="Required All" Dynamic="Required All" />
+    <!-- See https://github.com/reactiveui/ReactiveUI/issues/1330 -->
+    <Namespace Name="Windows.UI.Xaml.Controls" Dynamic="Required All" />
+    <Namespace Name="Windows.UI.Xaml" Dynamic="Required All" />
+  </Library>
+</Directives>

src/ReactiveUI/ReactiveUI.csproj

@@ -38,6 +38,10 @@
     <Compile Include="Platforms\uap10.0.16299\**\*.cs" />
   </ItemGroup>
 
+  <ItemGroup Label="Package" Condition=" $(TargetFramework.StartsWith('uap')) ">
+  	<None Include="Platforms\uap10.0.16299\ReactiveUI.rd.xml" PackagePath="lib\uap10.0.16299\ReactiveUI\Properties\ReactiveUI.rd.xml" Pack="true" />
+  </ItemGroup>
+
   <ItemGroup Condition=" $(TargetFramework.StartsWith('Xamarin.iOS')) ">
     <Compile Include="Platforms\apple-common\**\*.cs" />
     <Compile Include="Platforms\ios\**\*.cs" />