diff --git a/eng/Publishing.props b/eng/Publishing.props
index e276c66a9b..67b32a6bb5 100644
--- a/eng/Publishing.props
+++ b/eng/Publishing.props
@@ -1,6 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Licensed to the .NET Foundation under one or more agreements. The .NET Foundation licenses this file to you under the MIT license. See the License.txt file in the project root for more information. -->
-<Project>
+<Project>
    <PropertyGroup>
       <PublishingVersion>3</PublishingVersion>
    </PropertyGroup>
diff --git a/eng/Signing.props b/eng/Signing.props
index 590651595f..d319e3c158 100644
--- a/eng/Signing.props
+++ b/eng/Signing.props
@@ -1,6 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Licensed to the .NET Foundation under one or more agreements. The .NET Foundation licenses this file to you under the MIT license. See the License.txt file in the project root for more information. -->
-<Project>
+<Project>
   <ItemGroup>
     <FileSignInfo Include="Microsoft.DiaSymReader.dll" PublicKeyToken="31bf3856ad364e35" TargetFramework=".NETFramework,Version=v2.0" CertificateName="MicrosoftWin8WinBlue"/>
     <FileSignInfo Include="Microsoft.DiaSymReader.dll" PublicKeyToken="31bf3856ad364e35" TargetFramework=".NETStandard,Version=v1.1" CertificateName="Microsoft101240624"/>
diff --git a/eng/SourceBuild.props b/eng/SourceBuild.props
index 946e0bfe25..23f0ffe797 100644
--- a/eng/SourceBuild.props
+++ b/eng/SourceBuild.props
@@ -1,6 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Licensed to the .NET Foundation under one or more agreements. The .NET Foundation licenses this file to you under the MIT license. See the License.txt file in the project root for more information. -->
-<Project>
+<Project>
   <PropertyGroup>
     <GitHubRepositoryName>symreader</GitHubRepositoryName>
     <SourceBuildManagedOnly>true</SourceBuildManagedOnly>
diff --git a/eng/Versions.props b/eng/Versions.props
index 1bca3098a6..269ba3c44e 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -1,5 +1,3 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Licensed to the .NET Foundation under one or more agreements. The .NET Foundation licenses this file to you under the MIT license. See the License.txt file in the project root for more information. -->
 <Project>
   <PropertyGroup>
     <!-- This repo version -->
@@ -7,12 +5,11 @@
     <PreReleaseVersionLabel>beta</PreReleaseVersionLabel>
     <!-- Opt-in/out repo features -->
     <UsingToolPdbConverter>false</UsingToolPdbConverter>
-    <UsingToolNetFrameworkReferenceAssemblies>true</UsingToolNetFrameworkReferenceAssemblies>
     <UsingToolNuGetRepack>true</UsingToolNuGetRepack>
+    <FlagNetStandard1XDependencies>true</FlagNetStandard1XDependencies>
     <!-- Pinned -->
-    <SystemCollectionsImmutableVersion>5.0.0</SystemCollectionsImmutableVersion>
-    <SystemReflectionMetadataVersion>5.0.0</SystemReflectionMetadataVersion>
-    <SystemValueTupleVersion>4.5.0</SystemValueTupleVersion>
     <MicrosoftDiaSymReaderNativeVersion>17.0.0-beta1.21524.1</MicrosoftDiaSymReaderNativeVersion>
+    <NETStandardLibraryVersion>2.0.3</NETStandardLibraryVersion>
+    <SystemCollectionsImmutableVersion>7.0.0</SystemCollectionsImmutableVersion>
   </PropertyGroup>
 </Project>
diff --git a/src/Directory.Build.props b/src/Directory.Build.props
index 1abdd4df98..2bcd46adec 100644
--- a/src/Directory.Build.props
+++ b/src/Directory.Build.props
@@ -1,6 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Licensed to the .NET Foundation under one or more agreements. The .NET Foundation licenses this file to you under the MIT license. See the License.txt file in the project root for more information. -->
-<Project>
+<Project>
   <Import Project="Sdk.props" Sdk="Microsoft.DotNet.Arcade.Sdk" />
 
   <PropertyGroup>
diff --git a/src/Directory.Build.targets b/src/Directory.Build.targets
index 8888098f03..eb55cb91c4 100644
--- a/src/Directory.Build.targets
+++ b/src/Directory.Build.targets
@@ -1,5 +1,8 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Licensed to the .NET Foundation under one or more agreements. The .NET Foundation licenses this file to you under the MIT license. See the License.txt file in the project root for more information. -->
-<Project>
+<Project>
   <Import Project="Sdk.targets" Sdk="Microsoft.DotNet.Arcade.Sdk" />
+
+  <ItemGroup Condition="'$(IsTestProject)' == 'true' or '$(MSBuildProjectName)' == 'TestUtilities'">
+    <!-- Upgrade the NETStandard.Library transitive xunit dependency to avoid transitive 1.x NS dependencies. -->
+    <PackageReference Include="NETStandard.Library" Version="$(NETStandardLibraryVersion)" Condition="'$(TargetFrameworkIdentifier)' != '.NETStandard'" />
+  </ItemGroup>
 </Project>
diff --git a/src/Microsoft.DiaSymReader.Native.Tests/Microsoft.DiaSymReader.Native.UnitTests.csproj b/src/Microsoft.DiaSymReader.Native.Tests/Microsoft.DiaSymReader.Native.UnitTests.csproj
index 91aaf388d1..afe18a571e 100644
--- a/src/Microsoft.DiaSymReader.Native.Tests/Microsoft.DiaSymReader.Native.UnitTests.csproj
+++ b/src/Microsoft.DiaSymReader.Native.Tests/Microsoft.DiaSymReader.Native.UnitTests.csproj
@@ -1,6 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Licensed to the .NET Foundation under one or more agreements. The .NET Foundation licenses this file to you under the MIT license. See the License.txt file in the project root for more information. -->
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFrameworks>$(NetCurrent);$(NetFrameworkMinimum)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
diff --git a/src/Microsoft.DiaSymReader.Tests/Microsoft.DiaSymReader.UnitTests.csproj b/src/Microsoft.DiaSymReader.Tests/Microsoft.DiaSymReader.UnitTests.csproj
index fc506c888b..75972762d7 100644
--- a/src/Microsoft.DiaSymReader.Tests/Microsoft.DiaSymReader.UnitTests.csproj
+++ b/src/Microsoft.DiaSymReader.Tests/Microsoft.DiaSymReader.UnitTests.csproj
@@ -1,6 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Licensed to the .NET Foundation under one or more agreements. The .NET Foundation licenses this file to you under the MIT license. See the License.txt file in the project root for more information. -->
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFrameworks>$(NetCurrent);$(NetFrameworkMinimum)</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
@@ -14,7 +12,6 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.DiaSymReader.Native" Version="$(MicrosoftDiaSymReaderNativeVersion)" />
-    <PackageReference Include="System.ValueTuple" Version="$(SystemValueTupleVersion)" />
   </ItemGroup>
   <ItemGroup Condition="'$(OS)' == 'Windows_NT'">
     <!-- Copy DSRN to a subdirectory of the output directory, so that we can test alternative load path -->
diff --git a/src/Microsoft.DiaSymReader/Microsoft.DiaSymReader.csproj b/src/Microsoft.DiaSymReader/Microsoft.DiaSymReader.csproj
index 07cb3c3143..52e4bf15d0 100644
--- a/src/Microsoft.DiaSymReader/Microsoft.DiaSymReader.csproj
+++ b/src/Microsoft.DiaSymReader/Microsoft.DiaSymReader.csproj
@@ -1,6 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Licensed to the .NET Foundation under one or more agreements. The .NET Foundation licenses this file to you under the MIT license. See the License.txt file in the project root for more information. -->
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
diff --git a/src/PdbTestResources/PdbTestResources.csproj b/src/PdbTestResources/PdbTestResources.csproj
index 1804e71489..ab60d9dba8 100644
--- a/src/PdbTestResources/PdbTestResources.csproj
+++ b/src/PdbTestResources/PdbTestResources.csproj
@@ -1,6 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Licensed to the .NET Foundation under one or more agreements. The .NET Foundation licenses this file to you under the MIT license. See the License.txt file in the project root for more information. -->
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
     <IsShipping>false</IsShipping>
diff --git a/src/TestUtilities/TestUtilities.csproj b/src/TestUtilities/TestUtilities.csproj
index 1cceec8219..610fd0f513 100644
--- a/src/TestUtilities/TestUtilities.csproj
+++ b/src/TestUtilities/TestUtilities.csproj
@@ -1,18 +1,17 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Licensed to the .NET Foundation under one or more agreements. The .NET Foundation licenses this file to you under the MIT license. See the License.txt file in the project root for more information. -->
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>$(NetCurrent);$(NetFrameworkMinimum)</TargetFrameworks>
     <IsShipping>false</IsShipping>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <ExcludeFromSourceBuild>true</ExcludeFromSourceBuild>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="System.Collections.Immutable" Version="$(SystemCollectionsImmutableVersion)" />
-    <PackageReference Include="System.Reflection.Metadata" Version="$(SystemReflectionMetadataVersion)" />
     <PackageReference Include="xunit.assert" Version="$(XunitVersion)" />
     <PackageReference Include="xunit.extensibility.core" Version="$(XunitVersion)" />
   </ItemGroup>
+  <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETFramework'">
+    <PackageReference Include="System.Collections.Immutable" Version="$(SystemCollectionsImmutableVersion)" />
+  </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Microsoft.DiaSymReader\Microsoft.DiaSymReader.csproj" />
   </ItemGroup>