Updated

build/Avalonia.Desktop.props

@@ -16,4 +16,4 @@
   <ItemGroup>
     <PackageReference Include="Serilog.Sinks.Trace" Version="2.1.0" />
   </ItemGroup>
-</Project>
+</Project>

build/Avalonia.props

@@ -11,4 +11,4 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.5.0" />
   </ItemGroup>
-</Project>
+</Project>

build/Rx.props

@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
     <PackageReference Include="System.Reactive" Version="4.0.0" />
@@ -7,4 +8,4 @@
     <PackageReference Include="System.Reactive.PlatformServices" Version="4.0.0" />
     <PackageReference Condition="$(TargetFramework.StartsWith('net4'))" Include="System.Reactive.Windows.Threading" Version="4.0.0" />
   </ItemGroup>
-</Project>
+</Project>