diff --git a/src/libraries/Microsoft.Win32.Registry.AccessControl/pkg/Microsoft.Win32.Registry.AccessControl.pkgproj b/src/libraries/Microsoft.Win32.Registry.AccessControl/pkg/Microsoft.Win32.Registry.AccessControl.pkgproj
index d69a84b0eb7c88..95a5015b3ce323 100644
--- a/src/libraries/Microsoft.Win32.Registry.AccessControl/pkg/Microsoft.Win32.Registry.AccessControl.pkgproj
+++ b/src/libraries/Microsoft.Win32.Registry.AccessControl/pkg/Microsoft.Win32.Registry.AccessControl.pkgproj
@@ -5,11 +5,8 @@
       <SupportedFramework>net461;uap10.0.16299;netcoreapp2.0;$(AllXamarinFrameworks)</SupportedFramework>
     </ProjectReference>
     <ProjectReference Include="..\src\Microsoft.Win32.Registry.AccessControl.csproj" />
-    <HarvestIncludePaths Include="ref/net46;lib/net46;runtimes/win/lib/net46" />
-    <HarvestIncludePaths Include="ref/netstandard1.3">
-      <SupportedFramework>netcore50</SupportedFramework>
-    </HarvestIncludePaths>
-    <HarvestIncludePaths Include="runtimes/win/lib/netstandard1.3;lib/netstandard1.3" />
+    <!-- Exclude TFMs that aren't supported by the package anymore from validation. -->
+    <ExcludeHarvestedSupportedFramework Include="netcoreapp1.0;netcoreapp1.1;netcore50;uap10.0;net46" />
   </ItemGroup>
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
 </Project>
\ No newline at end of file
diff --git a/src/libraries/System.IO.FileSystem.AccessControl/pkg/System.IO.FileSystem.AccessControl.pkgproj b/src/libraries/System.IO.FileSystem.AccessControl/pkg/System.IO.FileSystem.AccessControl.pkgproj
index 5a69857140ef11..f6c16d48b531e8 100644
--- a/src/libraries/System.IO.FileSystem.AccessControl/pkg/System.IO.FileSystem.AccessControl.pkgproj
+++ b/src/libraries/System.IO.FileSystem.AccessControl/pkg/System.IO.FileSystem.AccessControl.pkgproj
@@ -5,17 +5,8 @@
       <SupportedFramework>net461;netcoreapp2.0;uap10.0.16299;$(AllXamarinFrameworks)</SupportedFramework>
     </ProjectReference>
     <ProjectReference Include="..\src\System.IO.FileSystem.AccessControl.csproj" />
-    <HarvestIncludePaths Include="ref/net46;lib/net46;runtimes/win/lib/net46" />
-    <HarvestIncludePaths Include="ref/netstandard1.3">
-      <SupportedFramework>netcore50</SupportedFramework>
-    </HarvestIncludePaths>
-    <HarvestIncludePaths Include="runtimes/win/lib/netstandard1.3;lib/netstandard1.3" />
-
-    <!-- 
-      Suppress NETStandard.Library collpasing as it add more dependencies then needed in some 
-      scenarios like .NET Framework which adds an unecessary amount of package dependencies to download 
-    -->
-    <SuppressMetaPackage Include="NETStandard.Library" />
+    <!-- Exclude TFMs that aren't supported by the package anymore from validation. -->
+    <ExcludeHarvestedSupportedFramework Include="netcoreapp1.0;netcoreapp1.1;netcore50;uap10.0;net46" />
   </ItemGroup>
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
 </Project>
\ No newline at end of file
diff --git a/src/libraries/System.IO.Pipelines/pkg/System.IO.Pipelines.pkgproj b/src/libraries/System.IO.Pipelines/pkg/System.IO.Pipelines.pkgproj
index 9b454d0d07b4b5..7d757b9d43e842 100644
--- a/src/libraries/System.IO.Pipelines/pkg/System.IO.Pipelines.pkgproj
+++ b/src/libraries/System.IO.Pipelines/pkg/System.IO.Pipelines.pkgproj
@@ -10,13 +10,15 @@
       <SupportedFramework>net461;netcoreapp2.0;uap10.0.16299;$(AllXamarinFrameworks)</SupportedFramework>
     </ProjectReference>
     <ProjectReference Include="..\src\System.IO.Pipelines.csproj" />
-    <HarvestIncludePaths Include="lib/netstandard1.3" />
 
     <!-- Even though this library is inbox we want to treat it as out
          of box in the package so that we can continue to evolve it. -->
     <ValidatePackageSuppression Include="TreatAsOutOfBox">
       <Value>.NETCoreApp</Value>
     </ValidatePackageSuppression>
+
+    <!-- Exclude TFMs that aren't supported by the package anymore from validation. -->
+    <ExcludeHarvestedSupportedFramework Include="netcoreapp1.0;netcoreapp1.1;netcore50;uap10.0;net46" />
   </ItemGroup>
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
 </Project>
diff --git a/src/libraries/System.Net.Http.WinHttpHandler/pkg/System.Net.Http.WinHttpHandler.pkgproj b/src/libraries/System.Net.Http.WinHttpHandler/pkg/System.Net.Http.WinHttpHandler.pkgproj
index ecad955acd0fcc..e7c9f897745888 100644
--- a/src/libraries/System.Net.Http.WinHttpHandler/pkg/System.Net.Http.WinHttpHandler.pkgproj
+++ b/src/libraries/System.Net.Http.WinHttpHandler/pkg/System.Net.Http.WinHttpHandler.pkgproj
@@ -1,19 +1,11 @@
 <Project DefaultTargets="Build">
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.props))" />
   <ItemGroup>
-    <ProjectReference Include="..\ref\System.Net.Http.WinHttpHandler.csproj">
-      <SupportedFramework>net461;netcoreapp2.0;$(AllXamarinFrameworks)</SupportedFramework>
-    </ProjectReference>
     <ProjectReference Include="..\src\System.Net.Http.WinHttpHandler.csproj">
       <SupportedFramework>net461;netcoreapp2.0;uap10.0.16299;$(AllXamarinFrameworks)</SupportedFramework>
     </ProjectReference>
-    <HarvestIncludePaths Include="lib/net46;runtimes/win/lib/net46" />
-    <HarvestIncludePaths Include="runtimes/win/lib/netstandard1.3;lib/netstandard1.3" />
+    <!-- Exclude TFMs that aren't supported by the package anymore from validation. -->
+    <ExcludeHarvestedSupportedFramework Include="netcoreapp1.0;netcoreapp1.1;netcore50;uap10.0;net46" />
   </ItemGroup>
-  <PropertyGroup>
-    <!-- Excluding the reference assets on the package so that RAR will see the run-time conflicts at build time in order to
-    generate the right binding redirects when targeting Desktop. https://github.com/dotnet/runtime/issues/27470 -->
-    <ExcludeReferenceAssets>true</ExcludeReferenceAssets>
-  </PropertyGroup>
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
 </Project>
\ No newline at end of file
diff --git a/src/libraries/System.Reflection.Context/pkg/System.Reflection.Context.pkgproj b/src/libraries/System.Reflection.Context/pkg/System.Reflection.Context.pkgproj
index ba867d6c723a2f..ed4d4cb13313c6 100644
--- a/src/libraries/System.Reflection.Context/pkg/System.Reflection.Context.pkgproj
+++ b/src/libraries/System.Reflection.Context/pkg/System.Reflection.Context.pkgproj
@@ -16,8 +16,7 @@
     <ValidatePackageSuppression Include="TreatAsOutOfBox">
       <Value>UAP</Value>
     </ValidatePackageSuppression>
-
-    <HarvestIncludePaths Include="ref/netcore50;lib/netcore50;ref/portable-net45+win8;lib/portable-net45+win8" />
   </ItemGroup>
+  
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
 </Project>
\ No newline at end of file
diff --git a/src/libraries/System.ServiceProcess.ServiceController/pkg/System.ServiceProcess.ServiceController.pkgproj b/src/libraries/System.ServiceProcess.ServiceController/pkg/System.ServiceProcess.ServiceController.pkgproj
index 1ed1fcae402b65..5f06dcd7316c79 100644
--- a/src/libraries/System.ServiceProcess.ServiceController/pkg/System.ServiceProcess.ServiceController.pkgproj
+++ b/src/libraries/System.ServiceProcess.ServiceController/pkg/System.ServiceProcess.ServiceController.pkgproj
@@ -5,10 +5,8 @@
       <SupportedFramework>net461;netcoreapp2.0;uap10.0.16299;$(AllXamarinFrameworks)</SupportedFramework>
     </ProjectReference>
     <ProjectReference Include="..\src\System.ServiceProcess.ServiceController.csproj" />
-    <HarvestIncludePaths Include="ref/netstandard1.4">
-      <SupportedFramework>netcore50</SupportedFramework>
-    </HarvestIncludePaths>
-    <HarvestIncludePaths Include="runtimes/win/lib/netstandard1.5;lib/netstandard1.4" />
+    <!-- Exclude TFMs that aren't supported by the package anymore from validation. -->
+    <ExcludeHarvestedSupportedFramework Include="netcoreapp1.0;netcoreapp1.1;netcore50;uap10.0" />
   </ItemGroup>
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
 </Project>
\ No newline at end of file
diff --git a/src/libraries/System.Text.Encodings.Web/pkg/System.Text.Encodings.Web.pkgproj b/src/libraries/System.Text.Encodings.Web/pkg/System.Text.Encodings.Web.pkgproj
index 9cc15ac1ac7c54..d4a2566a2d05ee 100644
--- a/src/libraries/System.Text.Encodings.Web/pkg/System.Text.Encodings.Web.pkgproj
+++ b/src/libraries/System.Text.Encodings.Web/pkg/System.Text.Encodings.Web.pkgproj
@@ -1,13 +1,9 @@
 <Project DefaultTargets="Build">
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.props))" />
   <ItemGroup>
-    <ProjectReference Include="..\ref\System.Text.Encodings.Web.csproj">
-      <SupportedFramework>net461;netcoreapp2.0;uap10.0.16299;$(AllXamarinFrameworks)</SupportedFramework>
-    </ProjectReference>
     <ProjectReference Include="..\src\System.Text.Encodings.Web.csproj">
       <SupportedFramework>net461;netcoreapp2.0;uap10.0.16299;$(AllXamarinFrameworks)</SupportedFramework>
     </ProjectReference>
-    <HarvestIncludePaths Include="lib/netstandard1.0" />
     <!-- Since UAP and .NETCoreApp are package based we still want to enable
      OOBing libraries that happen to overlap with their framework package.
      This avoids us having to lock the API in our NuGet packages just 
@@ -16,11 +12,8 @@
     <ValidatePackageSuppression Include="TreatAsOutOfBox">
       <Value>.NETCoreApp;UAP</Value>
     </ValidatePackageSuppression>
+    <!-- Exclude TFMs that aren't supported by the package anymore from validation. -->
+    <ExcludeHarvestedSupportedFramework Include="netcoreapp1.0;netcoreapp1.1;netcore45;netcore451;netcore50;uap10.0;net45;net451;net46;wp8;wpa81" />
   </ItemGroup>
-  <PropertyGroup>
-    <!-- Excluding the reference assets on the package so that RAR will see the run-time conflicts at build time in order to
-    generate the right binding redirects when targeting Desktop. https://github.com/dotnet/runtime/issues/27470 -->
-    <ExcludeReferenceAssets>true</ExcludeReferenceAssets>
-  </PropertyGroup>
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
 </Project>
\ No newline at end of file
diff --git a/src/libraries/System.Threading.AccessControl/pkg/System.Threading.AccessControl.pkgproj b/src/libraries/System.Threading.AccessControl/pkg/System.Threading.AccessControl.pkgproj
index 0ced8fd1327ce6..7c7145ce3e4914 100644
--- a/src/libraries/System.Threading.AccessControl/pkg/System.Threading.AccessControl.pkgproj
+++ b/src/libraries/System.Threading.AccessControl/pkg/System.Threading.AccessControl.pkgproj
@@ -5,11 +5,8 @@
       <SupportedFramework>net461;uap10.0.16299;netcoreapp2.0;$(AllXamarinFrameworks)</SupportedFramework>
     </ProjectReference>
     <ProjectReference Include="..\src\System.Threading.AccessControl.csproj" />
-    <HarvestIncludePaths Include="ref/net46;lib/net46;runtimes/win/lib/net46" />
-    <HarvestIncludePaths Include="ref/netstandard1.3">
-      <SupportedFramework>netcore50</SupportedFramework>
-    </HarvestIncludePaths>
-    <HarvestIncludePaths Include="runtimes/win/lib/netstandard1.3;lib/netstandard1.3" />
+    <!-- Exclude TFMs that aren't supported by the package anymore from validation. -->
+    <ExcludeHarvestedSupportedFramework Include="netcoreapp1.0;netcoreapp1.1;net46;netcore50;uap10.0" />
   </ItemGroup>
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
 </Project>
\ No newline at end of file
diff --git a/src/libraries/pkg/baseline/packageIndex.json b/src/libraries/pkg/baseline/packageIndex.json
index 2fcf90dfb422b8..a9476f29b81f17 100644
--- a/src/libraries/pkg/baseline/packageIndex.json
+++ b/src/libraries/pkg/baseline/packageIndex.json
@@ -4907,10 +4907,7 @@
       "BaselineVersion": "6.0.0",
       "InboxOn": {
         "net45": "4.0.0.0",
-        "portable46-net451+win81": "4.0.0.0",
-        "portable45-net45+win8": "4.0.0.0",
-        "uap10.0.16299": "4.0.3.0",
-        "win8": "4.0.0.0"
+        "uap10.0.16299": "4.0.3.0"
       },
       "AssemblyVersionInPackageVersion": {
         "4.0.0.0": "4.0.0",