diff --git a/src/libraries/Directory.Build.props b/src/libraries/Directory.Build.props
index 826b10649c8714..3900b9babe4229 100644
--- a/src/libraries/Directory.Build.props
+++ b/src/libraries/Directory.Build.props
@@ -51,75 +51,6 @@
     <Configuration Condition="'$(Configuration)'==''">Debug</Configuration>
     <BuildSettings Condition="'$(BuildSettings)' == ''">$(BuildTargetFramework)-$(TargetOS)-$(Configuration)-$(TargetArchitecture)</BuildSettings>
   </PropertyGroup>
-  
-  <Choose>
-    <When Condition="'$(TargetFrameworkSuffix)' == 'Windows_NT'">
-      <PropertyGroup>
-        <TargetsWindows>true</TargetsWindows>
-        <PackageTargetRuntime>win</PackageTargetRuntime>
-      </PropertyGroup>
-    </When>
-    <When Condition="'$(TargetFrameworkSuffix)' == 'Unix'">
-      <PropertyGroup>
-        <TargetsUnix>true</TargetsUnix>
-        <PackageTargetRuntime>unix</PackageTargetRuntime>
-      </PropertyGroup>
-    </When>
-    <When Condition="'$(TargetFrameworkSuffix)' == 'Linux'">
-      <PropertyGroup>
-        <TargetsUnix>true</TargetsUnix>
-        <TargetsLinux>true</TargetsLinux>
-        <PackageTargetRuntime>linux</PackageTargetRuntime>
-      </PropertyGroup>
-    </When>
-    <When Condition="'$(TargetFrameworkSuffix)' == 'Android'">
-      <PropertyGroup>
-        <TargetsUnix>true</TargetsUnix>
-        <TargetsLinux>true</TargetsLinux>
-        <TargetsAndroid>true</TargetsAndroid>
-        <PackageTargetRuntime>android</PackageTargetRuntime>
-      </PropertyGroup>
-    </When>
-    <When Condition="'$(TargetFrameworkSuffix)' == 'OSX'">
-      <PropertyGroup>
-        <TargetsUnix>true</TargetsUnix>
-        <TargetsOSX>true</TargetsOSX>
-        <PackageTargetRuntime>osx</PackageTargetRuntime>
-      </PropertyGroup>
-    </When>
-    <When Condition="'$(TargetFrameworkSuffix)' == 'iOS'">
-      <PropertyGroup>
-        <TargetsUnix>true</TargetsUnix>
-        <TargetsiOS>true</TargetsiOS>
-        <PackageTargetRuntime>ios</PackageTargetRuntime>
-      </PropertyGroup>
-    </When>
-    <When Condition="'$(TargetFrameworkSuffix)' == 'FreeBSD'">
-      <PropertyGroup>
-        <TargetsUnix>true</TargetsUnix>
-        <TargetsFreeBSD>true</TargetsFreeBSD>
-        <PackageTargetRuntime>freebsd</PackageTargetRuntime>
-      </PropertyGroup>
-    </When>
-    <When Condition="'$(TargetFrameworkSuffix)' == 'NetBSD'">
-      <PropertyGroup>
-        <TargetsUnix>true</TargetsUnix>
-        <TargetsNetBSD>true</TargetsNetBSD>
-        <PackageTargetRuntime>netbsd</PackageTargetRuntime>
-      </PropertyGroup>
-    </When>
-    <When Condition="'$(TargetFrameworkSuffix)' == 'WebAssembly'">
-      <PropertyGroup>
-        <TargetsLinux>true</TargetsLinux>
-        <TargetsWebAssembly>true</TargetsWebAssembly>
-      </PropertyGroup>
-    </When>
-    <When Condition="'$(TargetFrameworkSuffix)' == ''">
-      <PropertyGroup>
-        <TargetsAnyOS>true</TargetsAnyOS>
-      </PropertyGroup>
-    </When>
-  </Choose>
 
   <!-- Define test projects and companions -->
   <PropertyGroup>
@@ -208,13 +139,6 @@
     <PackageRID Condition="'$(PackageRID)' == ''">$(RuntimeOS)-$(TargetArchitecture)</PackageRID>
   </PropertyGroup>
 
-  <!-- Set some shortcuts for more terse conditions in project files -->
-  <PropertyGroup>
-    <TargetsNetCoreApp Condition="$(TargetFramework.StartsWith('netcoreapp'))">true</TargetsNetCoreApp>
-    <TargetsNetStandard Condition="$(TargetFramework.StartsWith('netstandard'))">true</TargetsNetStandard>
-    <TargetsNetFx Condition="$(TargetFramework.StartsWith('net4'))">true</TargetsNetFx>
-  </PropertyGroup>
-
   <!-- set properties for each vertical -->
   <PropertyGroup>
     <BuildingNETCoreAppVertical Condition="'$(BuildingNETCoreAppVertical)' == '' and ('$(BuildTargetFramework)' == '$(NetCoreAppCurrent)' or '$(BuildAllConfigurations)' == 'true')">true</BuildingNETCoreAppVertical>
@@ -239,6 +163,7 @@
 
   <!-- Import packaging props -->
   <Import Project="$(RepositoryEngineeringDir)packaging.props" />
+  <Import Project="$(MSBuildThisDirectory)targetframework.props" Condition="'$(DesignTimeBuild)' != 'true'" />
 
   <PropertyGroup>
     <!-- Always pass portable to override arcade sdk which uses embedded for local builds -->
@@ -314,9 +239,7 @@
     <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
 
     <RuntimePath Condition="'$(RuntimePath)' == ''">$([MSBuild]::NormalizeDirectory('$(ArtifactsBinDir)', 'runtime', '$(BuildSettings)'))</RuntimePath>
-    <RefRootPath>$([MSBuild]::NormalizeDirectory('$(ArtifactsBinDir)', 'ref'))</RefRootPath>
     <BuildTargetFrameworkRefPath>$([MSBuild]::NormalizeDirectory('$(RefRootPath)', '$(BuildTargetFramework)'))</BuildTargetFrameworkRefPath>
-    <RefPath>$([MSBuild]::NormalizeDirectory('$(RefRootPath)', '$(TargetFramework)'))</RefPath>
     <NetStandard20RefPath>$([MSBuild]::NormalizeDirectory('$(RefRootPath)', 'netstandard2.0'))</NetStandard20RefPath>
     <NetStandard21RefPath>$([MSBuild]::NormalizeDirectory('$(RefRootPath)', 'netstandard2.1'))</NetStandard21RefPath>
     <NetFxRefPath>$([MSBuild]::NormalizeDirectory('$(RefRootPath)', '$(NetFrameworkCurrent)'))</NetFxRefPath>
@@ -348,9 +271,6 @@
     <!-- setting the output paths -->
     <OutputPath>$(BaseOutputPath)$(TargetFramework)-$(TargetFrameworkSuffix)-$(Configuration)\</OutputPath>
     <OutputPath Condition="'$(TargetFrameworkSuffix)' == ''">$(BaseOutputPath)$(TargetFramework)-$(Configuration)\</OutputPath>
-    <BaseIntermediateOutputPath>$([MSBuild]::NormalizeDirectory('$(ArtifactsObjDir)', '$(MSBuildProjectName)'))</BaseIntermediateOutputPath>
-    <IntermediateOutputPath>$(BaseIntermediateOutputPath)$(TargetFramework)-$(TargetFrameworkSuffix)-$(Configuration)\</IntermediateOutputPath>
-    <IntermediateOutputPath Condition="'$(TargetFrameworkSuffix)' == ''">$(BaseIntermediateOutputPath)$(TargetFramework)-$(Configuration)\</IntermediateOutputPath>
     <AdditionalBuildTargetFrameworks Condition="'$(DotNetBuildFromSource)' == 'true' and '$(BuildAllProjects)' == 'true'">$(AdditionalBuildTargetFrameworks);netstandard2.0</AdditionalBuildTargetFrameworks>
   </PropertyGroup>
 
diff --git a/src/libraries/Directory.Build.targets b/src/libraries/Directory.Build.targets
index 0da3b501d4e626..98f552d92ae339 100644
--- a/src/libraries/Directory.Build.targets
+++ b/src/libraries/Directory.Build.targets
@@ -22,6 +22,7 @@
     <StrongNameKeyId Condition="'$(IsTestProject)' == 'true'">$(TestStrongNameKeyId)</StrongNameKeyId>
   </PropertyGroup>
 
+  <Import Project="$(MSBuildThisDirectory)intellisense.targets" Condition="'$(DesignTimeBuild)' == 'true'" />
   <Import Project="$(RepositoryEngineeringDir)resources.targets" />
   <Import Project="Sdk.targets" Sdk="Microsoft.DotNet.Arcade.Sdk" />
 
diff --git a/src/libraries/intellisense.targets b/src/libraries/intellisense.targets
new file mode 100644
index 00000000000000..816f787e7541de
--- /dev/null
+++ b/src/libraries/intellisense.targets
@@ -0,0 +1,80 @@
+<Project>
+  <!-- We are reseting the target framework, so we need to reset the properties derived by the sdk
+    eg TargetFrameworkIdentifier, TargetFrameworkVersion. In order to do that we are copying the sdk
+    parsing code https://github.com/dotnet/sdk/blob/master/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.TargetFrameworkInference.targets#L47
+  -->
+  <PropertyGroup>
+    <_UnsupportedTargetFrameworkError></_UnsupportedTargetFrameworkError>
+    <TargetFrameworkIdentifier></TargetFrameworkIdentifier>
+    <TargetFrameworkVersion></TargetFrameworkVersion>
+    <TargetFrameworkMoniker></TargetFrameworkMoniker>
+    <NuGetTargetMoniker></NuGetTargetMoniker>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="$(TargetFramework.Contains('-'))">
+    <_OriginalTargetFramework>$(TargetFramework)</_OriginalTargetFramework>
+    <TargetFrameworkSuffix>$(TargetFramework.SubString($([MSBuild]::Add($(TargetFramework.IndexOf('-')), 1))))</TargetFrameworkSuffix>
+    <TargetFramework>$(TargetFramework.SubString(0, $(TargetFramework.IndexOf('-'))))</TargetFramework>
+  </PropertyGroup>
+
+    <!-- Split $(TargetFramework) (e.g. net45) into short identifier and short version (e.g. 'net' and '45'). -->
+  <PropertyGroup Condition="'$(TargetFramework)' != '' and !$(TargetFramework.Contains(',')) and !$(TargetFramework.Contains('+'))">
+   <_ShortFrameworkIdentifier>$(TargetFramework.TrimEnd('.0123456789'))</_ShortFrameworkIdentifier>
+   <_ShortFrameworkVersion>$(TargetFramework.Substring($(_ShortFrameworkIdentifier.Length)))</_ShortFrameworkVersion>
+  </PropertyGroup>
+
+  <!-- Versions with dots are taken as is and just given leading 'v'. -->
+  <PropertyGroup Condition="'$(TargetFrameworkVersion)' == '' and '$(_ShortFrameworkVersion)' != '' and $(_ShortFrameworkVersion.Contains('.'))">
+    <TargetFrameworkVersion>v$(_ShortFrameworkVersion)</TargetFrameworkVersion>
+  </PropertyGroup>
+
+  <!-- Versions with no dots and up to 3 characters get leading 'v' and implicit dots between characters. -->
+  <PropertyGroup Condition="'$(TargetFrameworkVersion)' == '' and '$(_ShortFrameworkVersion)' != ''">
+    <TargetFrameworkVersion Condition="$(_ShortFrameworkVersion.Length) == 1">v$(_ShortFrameworkVersion[0]).0</TargetFrameworkVersion>
+    <TargetFrameworkVersion Condition="$(_ShortFrameworkVersion.Length) == 2">v$(_ShortFrameworkVersion[0]).$(_ShortFrameworkVersion[1])</TargetFrameworkVersion>
+    <TargetFrameworkVersion Condition="$(_ShortFrameworkVersion.Length) == 3">v$(_ShortFrameworkVersion[0]).$(_ShortFrameworkVersion[1]).$(_ShortFrameworkVersion[2])</TargetFrameworkVersion>
+  </PropertyGroup>
+  
+  <!-- Map short name to long name. See earlier comment for example of how to work with identifiers that are not recognized here. -->
+  <PropertyGroup Condition="'$(TargetFrameworkIdentifier)' == ''">
+    <TargetFrameworkIdentifier Condition="'$(_ShortFrameworkIdentifier)' == 'netstandard'">.NETStandard</TargetFrameworkIdentifier>
+    <TargetFrameworkIdentifier Condition="'$(_ShortFrameworkIdentifier)' == 'netcoreapp'">.NETCoreApp</TargetFrameworkIdentifier>
+    
+    <!-- The meaning of "net" as a short framework name depends on the version.  If it's 4.x or less, it means .NETFramework.
+         If the version is 5.0 or higher, then "net" means .NET 5.0 and on, which is the evolution of .NET Core, and uses
+         the .NETCoreApp TargetFrameworkIdentifier. -->
+    <TargetFrameworkIdentifier Condition="'$(_ShortFrameworkIdentifier)' == 'net' And
+                                          $([MSBuild]::VersionLessThan($(TargetFrameworkVersion), '5.0'))">.NETFramework</TargetFrameworkIdentifier>
+    <TargetFrameworkIdentifier Condition="'$(_ShortFrameworkIdentifier)' == 'net' And
+                                          $([MSBuild]::VersionGreaterThanOrEquals($(TargetFrameworkVersion), '5.0'))">.NETCoreApp</TargetFrameworkIdentifier>
+  </PropertyGroup>
+
+  <!-- 
+    Trigger an error if we're unable to infer the framework identifier and version. 
+    We have to evaluate this here and not in the target because by the time the target runs,
+    Microsoft.Common.targets will have defaulted to .NETFramework,Version=v4.0
+  -->
+  <PropertyGroup Condition="'$(TargetFrameworkIdentifier)' == '' or '$(TargetFrameworkVersion)' == ''">
+    <_UnsupportedTargetFrameworkError>true</_UnsupportedTargetFrameworkError>
+  </PropertyGroup>
+
+  <Import Project="$(MSBuildThisDirectory)targetframework.props" />
+  
+  <PropertyGroup>
+    <GeneratedAssemblyInfoFile>$(IntermediateOutputPath)$(MSBuildProjectName).AssemblyInfo$(DefaultLanguageSourceExtension)</GeneratedAssemblyInfoFile>
+  </PropertyGroup>
+  
+  <PropertyGroup Condition="'$(TargetFrameworkIdentifier)' != '' and '$(TargetFrameworkVersion)' != ''">
+    <TargetFrameworkMoniker Condition="'$(TargetFrameworkMoniker)' == '' and '$([System.String]::IsNullOrWhitespace($(TargetFrameworkProfile)))' != 'true'">$(TargetFrameworkIdentifier),Version=$(TargetFrameworkVersion),Profile=$(TargetFrameworkProfile)</TargetFrameworkMoniker>
+    <TargetFrameworkMoniker Condition="'$(TargetFrameworkMoniker)' == ''">$(TargetFrameworkIdentifier),Version=$(TargetFrameworkVersion)</TargetFrameworkMoniker>
+  </PropertyGroup>
+  
+  <PropertyGroup>
+    <!-- Note that the assets.cache file has contents that are unique to the current TFM and configuration and therefore cannot
+         be stored in a shared directory next to the assets.json file -->
+    <ProjectAssetsCacheFile Condition="'$(ProjectAssetsCacheFile)' == ''">$(IntermediateOutputPath)$(MSBuildProjectName).assets.cache</ProjectAssetsCacheFile>
+    <ProjectAssetsCacheFile>$([MSBuild]::NormalizePath($(MSBuildProjectDirectory), $(ProjectAssetsCacheFile)))</ProjectAssetsCacheFile>
+    <NuGetTargetMoniker>$(TargetFrameworkMoniker)</NuGetTargetMoniker>
+  </PropertyGroup>
+
+</Project>
diff --git a/src/libraries/targetframework.props b/src/libraries/targetframework.props
new file mode 100644
index 00000000000000..d0c0182d16c9e9
--- /dev/null
+++ b/src/libraries/targetframework.props
@@ -0,0 +1,85 @@
+<Project>
+  <Choose>
+    <When Condition="'$(TargetFrameworkSuffix)' == 'Windows_NT'">
+      <PropertyGroup>
+        <TargetsWindows>true</TargetsWindows>
+        <PackageTargetRuntime>win</PackageTargetRuntime>
+      </PropertyGroup>
+    </When>
+    <When Condition="'$(TargetFrameworkSuffix)' == 'Unix'">
+      <PropertyGroup>
+        <TargetsUnix>true</TargetsUnix>
+        <PackageTargetRuntime>unix</PackageTargetRuntime>
+      </PropertyGroup>
+    </When>
+    <When Condition="'$(TargetFrameworkSuffix)' == 'Linux'">
+      <PropertyGroup>
+        <TargetsUnix>true</TargetsUnix>
+        <TargetsLinux>true</TargetsLinux>
+        <PackageTargetRuntime>linux</PackageTargetRuntime>
+      </PropertyGroup>
+    </When>
+    <When Condition="'$(TargetFrameworkSuffix)' == 'Android'">
+      <PropertyGroup>
+        <TargetsUnix>true</TargetsUnix>
+        <TargetsLinux>true</TargetsLinux>
+        <TargetsAndroid>true</TargetsAndroid>
+        <PackageTargetRuntime>android</PackageTargetRuntime>
+      </PropertyGroup>
+    </When>
+    <When Condition="'$(TargetFrameworkSuffix)' == 'OSX'">
+      <PropertyGroup>
+        <TargetsUnix>true</TargetsUnix>
+        <TargetsOSX>true</TargetsOSX>
+        <PackageTargetRuntime>osx</PackageTargetRuntime>
+      </PropertyGroup>
+    </When>
+    <When Condition="'$(TargetFrameworkSuffix)' == 'iOS'">
+      <PropertyGroup>
+        <TargetsUnix>true</TargetsUnix>
+        <TargetsiOS>true</TargetsiOS>
+        <PackageTargetRuntime>ios</PackageTargetRuntime>
+      </PropertyGroup>
+    </When>
+    <When Condition="'$(TargetFrameworkSuffix)' == 'FreeBSD'">
+      <PropertyGroup>
+        <TargetsUnix>true</TargetsUnix>
+        <TargetsFreeBSD>true</TargetsFreeBSD>
+        <PackageTargetRuntime>freebsd</PackageTargetRuntime>
+      </PropertyGroup>
+    </When>
+    <When Condition="'$(TargetFrameworkSuffix)' == 'NetBSD'">
+      <PropertyGroup>
+        <TargetsUnix>true</TargetsUnix>
+        <TargetsNetBSD>true</TargetsNetBSD>
+        <PackageTargetRuntime>netbsd</PackageTargetRuntime>
+      </PropertyGroup>
+    </When>
+    <When Condition="'$(TargetFrameworkSuffix)' == 'WebAssembly'">
+      <PropertyGroup>
+        <TargetsLinux>true</TargetsLinux>
+        <TargetsWebAssembly>true</TargetsWebAssembly>
+      </PropertyGroup>
+    </When>
+    <When Condition="'$(TargetFrameworkSuffix)' == ''">
+      <PropertyGroup>
+        <TargetsAnyOS>true</TargetsAnyOS>
+      </PropertyGroup>
+    </When>
+  </Choose>
+  
+  <PropertyGroup>
+    <TargetsNetCoreApp Condition="$(TargetFramework.StartsWith('netcoreapp'))">true</TargetsNetCoreApp>
+    <TargetsNetStandard Condition="$(TargetFramework.StartsWith('netstandard'))">true</TargetsNetStandard>
+    <TargetsNetFx Condition="$(TargetFramework.StartsWith('net4'))">true</TargetsNetFx>   
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <RefRootPath>$([MSBuild]::NormalizeDirectory('$(ArtifactsBinDir)', 'ref'))</RefRootPath>
+    <RefPath>$([MSBuild]::NormalizeDirectory('$(RefRootPath)', '$(TargetFramework)'))</RefPath>
+    <BaseIntermediateOutputPath>$([MSBuild]::NormalizeDirectory('$(ArtifactsObjDir)', '$(MSBuildProjectName)'))</BaseIntermediateOutputPath>
+    <IntermediateOutputPath>$(BaseIntermediateOutputPath)$(TargetFramework)-$(TargetFrameworkSuffix)-$(Configuration)\</IntermediateOutputPath>
+    <IntermediateOutputPath Condition="'$(TargetFrameworkSuffix)' == ''">$(BaseIntermediateOutputPath)$(TargetFramework)-$(Configuration)\</IntermediateOutputPath>
+  </PropertyGroup>
+
+</Project>