api diff on all projects.

build/Base.props

@@ -2,5 +2,7 @@
   <ItemGroup>
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
     <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="4.6.0" />
+    <PackageReference Include="Microsoft.DotNet.ApiCompat" Version="5.0.0-beta.20364.3" PrivateAssets="All" />
+    <ResolvedMatchingContract Include="$(NuGetPackageRoot)\avalonia\0.10.0-preview1\lib\netstandard2.0\$(AssemblyName).dll" />
   </ItemGroup>
 </Project>

src/Avalonia.Base/Avalonia.Base.csproj

@@ -13,12 +13,4 @@
   <Import Project="..\..\build\Rx.props" />
   <Import Project="..\..\build\JetBrains.Annotations.props" />
   <Import Project="..\..\build\System.Memory.props" />
-
-  <ItemGroup>
-    <ResolvedMatchingContract Include="..\..\LastMajorVersionBinaries\$(AssemblyName).dll" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Microsoft.DotNet.ApiCompat" Version="5.0.0-beta.20364.3" PrivateAssets="All" />
-  </ItemGroup>
 </Project>