diff --git a/build/repo.targets b/build/repo.targets
index 8bc3dc002d..ffc26b1bc1 100644
--- a/build/repo.targets
+++ b/build/repo.targets
@@ -36,6 +36,8 @@
     <DependencyBuildDirectory>$(RepositoryRoot).deps\build\</DependencyBuildDirectory>
     <RuntimeStoreReferenceDirectory>$(ToolsDir)Build.RuntimeStore.References\</RuntimeStoreReferenceDirectory>
     <RuntimeStoreReferencePackageDirectory>$(RuntimeStoreReferenceDirectory)bin\Release\</RuntimeStoreReferencePackageDirectory>
+    <BuildTempDirectory>$(RepositoryRoot).build\temp\</BuildTempDirectory>
+
     <PrepareDependsOn>
       $(PrepareDependsOn);
       UpdateNuGetConfig
@@ -158,15 +160,20 @@
   </Target>
 
   <Target Name="AddDiaSymReaderToPath" Condition="'$(OS)' == 'Windows_NT'">
+    <Exec Command="powershell.exe $(ToolsDir)GetSharedFrameworkVersion.ps1" ConsoleToMSBuild="true">
+      <Output TaskParameter="ConsoleOutput" PropertyName="SharedFrameworkVersion" />
+    </Exec>
+
+    <MSBuild Projects="$(ProjectPath)" Targets="_AddDiaSymReaderFromCurrentSharedFramework" Properties="SharedFrameworkVersion=$(SharedFrameworkVersion)" Condition="'$(PACKAGE_CACHE_PLATFORM)' == 'x64'" />
+    <MSBuild Projects="$(ProjectPath)" Targets="_AddDiaSymReaderFromDownloadedSharedFramework" Properties="SharedFrameworkVersion=$(SharedFrameworkVersion)" Condition="'$(PACKAGE_CACHE_PLATFORM)' == 'x86'" />
+  </Target>
+
+  <Target Name="_AddDiaSymReaderFromCurrentSharedFramework">
     <!-- Parse framework version -->
     <GetDotNetHost>
       <Output TaskParameter="DotNetDirectory" PropertyName="DotnetHomeDirectory" />
     </GetDotNetHost>
 
-    <Exec Command="powershell.exe $(ToolsDir)GetSharedFrameworkVersion.ps1" ConsoleToMSBuild="true">
-      <Output TaskParameter="ConsoleOutput" PropertyName="SharedFrameworkVersion" />
-    </Exec>
-
     <PropertyGroup>
       <DiaSymReaderDirectory>$(DotnetHomeDirectory)shared\Microsoft.NETCore.App\$(SharedFrameworkVersion)</DiaSymReaderDirectory>
     </PropertyGroup>
@@ -176,6 +183,18 @@
     <SetEnvironmentVariable Variable="PATH" Value="$(PATH);$(DiaSymReaderDirectory)" />
   </Target>
 
+  <Target Name="_AddDiaSymReaderFromDownloadedSharedFramework">
+    <Exec Command="powershell.exe $(ToolsDir)InstallSharedFrameworkx86.ps1 $(SharedFrameworkVersion) $(BuildTempDirectory)"/>
+
+    <PropertyGroup>
+      <DiaSymReaderDirectory>$(BuildTempDirectory)shared\Microsoft.NETCore.App\$(SharedFrameworkVersion)</DiaSymReaderDirectory>
+    </PropertyGroup>
+
+    <Message Text="Adding DiaSymReader to PATH by appending: $(DiaSymReaderDirectory)" Importance="high" />
+
+    <SetEnvironmentVariable Variable="PATH" Value="$(PATH);$(DiaSymReaderDirectory)" />
+  </Target>
+
   <Target Name="_RemoveTimestampFromDepsFile">
     <GetOSPlatform>
       <!-- Returns {Linux, macOS, Windows} -->
diff --git a/tools/GetSharedFrameworkVersion.ps1 b/tools/GetSharedFrameworkVersion.ps1
index 9fb7365c08..37772625fe 100644
--- a/tools/GetSharedFrameworkVersion.ps1
+++ b/tools/GetSharedFrameworkVersion.ps1
@@ -3,4 +3,4 @@ $versions = $infoOutput | Select-String -Pattern "version"
 $FXVersionRaw = $versions | Select-Object -Last 1
 $FXVersionString = $FXVersionRaw.ToString()
 $FXVersion = $FXVersionString.SubString($FXVersionString.IndexOf(':') + 1).Trim()
-Write-Host $FXVersion
\ No newline at end of file
+Write-Host $FXVersion
diff --git a/tools/InstallSharedFrameworkx86.ps1 b/tools/InstallSharedFrameworkx86.ps1
new file mode 100644
index 0000000000..9931660110
--- /dev/null
+++ b/tools/InstallSharedFrameworkx86.ps1
@@ -0,0 +1,28 @@
+param (
+    [string]$sharedRuntimeVersion,
+    [string]$installationDirectory
+)
+
+$sharedRuntimeChannel = "master"
+if ($env:KOREBUILD_DOTNET_SHARED_RUNTIME_CHANNEL)
+{
+    $sharedRuntimeChannel = $env:KOREBUILD_DOTNET_SHARED_RUNTIME_CHANNEL
+}
+
+function InstallSharedRuntime([string] $version, [string] $channel, [string] $installDir)
+{
+    $sharedRuntimePath = [IO.Path]::Combine($installDir, 'shared', 'Microsoft.NETCore.App', $version)
+    # Avoid redownloading the CLI if it's already installed.
+    if (!(Test-Path $sharedRuntimePath))
+    {
+        & "$PSScriptRoot\..\.build\dotnet\dotnet-install.ps1" `
+            -Channel $channel `
+            -SharedRuntime `
+            -Version $version `
+            -Architecture 'x86' `
+            -InstallDir $installDir `
+            -NoPath
+    }
+}
+
+InstallSharedRuntime -version $sharedRuntimeVersion -channel $sharedRuntimeChannel -installDir $installationDirectory