diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index 5424e2e..674865a 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -2,18 +2,19 @@ name: CI Build
 run-name: CIBuild_${{ github.event_name }}_${{ github.ref_name }}_${{ github.run_number }}.${{ github.run_attempt }}
 
 env:
-  PKG_MAJOR_VERSION: 1.2
+  PKG_MAJOR_VERSION: 1.3
   PROJECT_NAME: DNX.Extensions
   DOTNET_VERSION: 8.0.x
   NUGET_VERSION: 5.x
   BUILD_CONFIG: Release
   BUILD_PLATFORM: Any CPU
   PACK_PARAMETERS: ''
-  COVERAGE_WARNING_THRESHOLD: 60
-  COVERAGE_ERROR_THRESHOLD: 80
+  COVERAGE_WARNING_THRESHOLD: 95
+  COVERAGE_ERROR_THRESHOLD: 85
   NUGET_OUTPUT_FOLDER: nupkgs
   BRANCH_PREFIX_RELEASE_CANDIDATE: rc/
   BRANCH_PREFIX_PUBLISH_CANDIDATE: beta/
+  BRANCH_NAME_BENCHMARK_CANDIDATE: benchmark
 
 on:
   push:
@@ -40,39 +41,79 @@ jobs:
 
     steps:
     - name: Get Current Build Date
-      id: build_date
       run: echo "build_date=$(date +'%y%j')" >> $GITHUB_ENV
 
-    - name: Set Package Suffix
-      id: package_suffix
+    - name: Evaluate pipeline conditions
       run: |
-        branch="${{ github.ref }}"
-        package_suffix=''
+        is_primary_branch=false
+        is_pull_request_build=false
+        is_release_candidate_branch=false
+        is_publish_candidate_branch=false
+        is_benchmark_candidate_branch=false
 
-        if [ "$branch" != "refs/heads/main" ]
+        # Primary Branch ?
+        if [ "${{ github.ref }}" == 'refs/heads/main' ]
         then
-            package_suffix='-beta'
+          is_primary_branch=true
         fi
 
-        echo "package_suffix=${package_suffix}" >> $GITHUB_ENV
+        # Pull Request ?
+        if [ "${{ github.event_name }}" == "pull_request" ]
+        then
+          is_pull_request_build=true
+        fi
+
+        # If Release Candidate branch ?
+        if [[ "${{ github.ref }}" == refs/heads/${{ env.BRANCH_PREFIX_RELEASE_CANDIDATE }}* ]]
+        then
+          is_release_candidate_branch=true
+        fi
+
+        # Is Publish Candidate branch ?
+        if [[ "${{ github.ref }}" == refs/heads/${{ env.BRANCH_PREFIX_PUBLISH_CANDIDATE }}* ]]
+        then
+          is_publish_candidate_branch=true
+        fi
+
+        # Is Benchmark Candidate branch ?
+        if [[ "${{ github.ref }}" == *${{ env.BRANCH_NAME_BENCHMARK_CANDIDATE }}* ]]
+        then
+          is_benchmark_candidate_branch=true
+        fi
+
+        # Set for later steps
+        echo "is_primary_branch=${is_primary_branch}" >> $GITHUB_ENV
+        echo "is_pull_request_build=${is_pull_request_build}" >> $GITHUB_ENV
+        echo "is_release_candidate_branch=${is_release_candidate_branch}" >> $GITHUB_ENV
+        echo "is_publish_candidate_branch=${is_publish_candidate_branch}" >> $GITHUB_ENV
+        echo "is_benchmark_candidate_branch=${is_benchmark_candidate_branch}" >> $GITHUB_ENV
+
+    - name: Determine Tagging
+      run: |
+        should_tag=false
+
+        if $is_primary_branch
+        then
+            should_tag=true
+        fi
+
+        echo "should_tag=${should_tag}" >> $GITHUB_ENV
 
-    - name: Determing GitHub Releasing
-      id: should_release
+    - name: Determine GitHub Releasing
       run: |
         should_release=false
         release_is_draft=false
         release_is_prerelease=false
 
-        if [ "${{ github.ref }}" == 'refs/heads/main' ]
+        if $is_primary_branch
         then
             should_release=true
-        elif [[ "${{ github.ref }}" == refs/heads/${{ env.BRANCH_PREFIX_RELEASE_CANDIDATE }}* ]]
+        elif $is_release_candidate_branch
         then
             should_release=true
             release_is_draft=true
 
-            if [ "${{ github.event_name }}" == "pull_request" ]
-            then
+            if $is_pull_request_build; then
               release_is_draft=false
               release_is_prerelease=true
             fi
@@ -82,49 +123,80 @@ jobs:
         echo "release_is_draft=${release_is_draft}" >> $GITHUB_ENV
         echo "release_is_prerelease=${release_is_prerelease}" >> $GITHUB_ENV
 
+    - name: Determine Benchmarking
+      run: |
+        should_benchmark=false
+
+        if $should_release
+        then
+            should_benchmark=true
+        elif $is_pull_request_build
+        then
+            should_benchmark=true
+        elif $is_benchmark_candidate_branch
+        then
+            should_benchmark=true
+        fi
+
+        echo "should_benchmark=${should_benchmark}" >> $GITHUB_ENV
+
     - name: Determine package publishing
-      id: should_publish
       run: |
         should_publish=false
 
-        if [ "${{ github.event_name }}" == "pull_request" ]
+        if $is_primary_branch
         then
             should_publish=true
-        elif [ "${{ github.ref }}" == "refs/heads/main" ]
+        elif $is_pull_request_build
         then
             should_publish=true
-        elif [[ "${{ github.ref }}" == refs/heads/${{ env.BRANCH_PREFIX_PUBLISH_CANDIDATE }}* ]]
+        elif $is_publish_candidate_branch
         then
             should_publish=true
         fi
 
         echo "should_publish=${should_publish}" >> $GITHUB_ENV
 
+    - name: Set Package Suffix
+      run: |
+        package_suffix=''
+
+        if !($is_primary_branch)
+        then
+            package_suffix='-beta'
+
+            if $should_release
+            then
+              package_suffix='-rc'
+            fi
+        fi
+
+        echo "package_suffix=${package_suffix}" >> $GITHUB_ENV
+
     - name: Set Product Version
-      id: product_version
       run: echo "product_version=${{ env.PKG_MAJOR_VERSION }}" >> $GITHUB_ENV
 
     - name: Set Assembly Version
-      id: assembly_version
       run: echo "assembly_version=${{ env.PKG_MAJOR_VERSION }}.${{ env.build_date }}.${{ github.run_number }}${{ github.run_attempt }}" >> $GITHUB_ENV
 
     - name: Set Package Version
-      id: package_version
       run: echo "package_version=${{ env.assembly_version }}${{ env.package_suffix }}" >> $GITHUB_ENV
 
     - name: Show Configuration
-      id: show_configuration
       run: env | sort
 
     outputs:
       assembly_version: ${{ env.assembly_version }}
       product_version: ${{ env.product_version }}
       package_version: ${{ env.package_version }}
+      should_tag: ${{ env.should_tag }}
       should_publish: ${{ env.should_publish }}
       should_release: ${{ env.should_release }}
+      should_benchmark: ${{ env.should_benchmark }}
       release_is_draft: ${{ env.release_is_draft }}
       release_is_prerelease: ${{ env.release_is_prerelease }}
 
+
   ##########################################################
   ## Build DotNet projects
   build:
@@ -160,8 +232,6 @@ jobs:
         comment-title: 'Unit Test Results'
         results-path: "**/*.trx"
         coverage-type: cobertura
-        #coverage-path: "**/coverage.cobertura.xml"
-        #coverage-threshold: ${{ env.COVERAGE_WARNING_THRESHOLD }}
 
     - name: Code Coverage Report
       uses: irongut/CodeCoverageSummary@v1.3.0
@@ -204,8 +274,32 @@ jobs:
         path: "${{ env.NUGET_OUTPUT_FOLDER }}/**"
         if-no-files-found: error
 
+
+  ##########################################################
+  ## Tag in git
+  tag:
+    name: Tag in GitHub
+    if: needs.setup.outputs.should_tag == 'true'
+
+    needs:
+      - setup
+      - build
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Tag git
+      uses: pkgdeps/git-tag-action@v3
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        github_repo: ${{ github.repository }}
+        git_commit_sha: ${{ github.sha }}
+        git_tag_prefix: "v"
+        version: ${{ needs.setup.outputs.assembly_version }}
+
+
   ##########################################################
-  ## Generate a Release and Tag in git
+  ## Generate a GitHub Release
   release:
     name: Create GitHub Release
     if: needs.setup.outputs.should_release == 'true'
@@ -226,7 +320,6 @@ jobs:
         path: nuget
 
     - name: Build Changelog
-      id: build_changelog
       uses: mikepenz/release-changelog-builder-action@v5
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -242,14 +335,35 @@ jobs:
         removeArtifacts: true
         artifacts: '**/*.nupkg'
 
-    - name: Tag git
-      uses: pkgdeps/git-tag-action@v3
+
+  ##########################################################
+  ## Benchmark Performance
+  benchmark:
+    name: Benchmark Performance
+    if: needs.setup.outputs.should_benchmark == 'true'
+
+    needs:
+      - setup
+      - build
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Install .NET SDK
+      uses: actions/setup-dotnet@v4
       with:
-        github_token: ${{ secrets.GITHUB_TOKEN }}
-        github_repo: ${{ github.repository }}
-        git_commit_sha: ${{ github.sha }}
-        git_tag_prefix: "v"
-        version: ${{ needs.setup.outputs.assembly_version }}
+        dotnet-version: ${{ env.DOTNET_VERSION }}
+
+    - name: Run Benchmarks
+      run: dotnet run --configuration ${{ env.BUILD_CONFIG }} --project tests/DNX.Extensions.Benchmarks
+
+    - name: Publish Benchmark output
+      run: |
+        cat BenchmarkDotNet.Artifacts/results/*Benchmarks-report-github.md >> $GITHUB_STEP_SUMMARY
+
 
   ##########################################################
   ## Publish to NuGet
@@ -271,7 +385,6 @@ jobs:
         nuget-version: ${{ env.NUGET_VERSION }}
 
     - name: Download NuGet Output
-      id: download_nuget
       uses: actions/download-artifact@v4
       with:
         name: nuget_output
diff --git a/DNX.Extensions.sln b/DNX.Extensions.sln
index dd9ab94..476873c 100644
--- a/DNX.Extensions.sln
+++ b/DNX.Extensions.sln
@@ -24,8 +24,12 @@ EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = ".docs", ".docs", "{8700E3D9-9248-4679-A0E8-8AB3E0B3B09D}"
 	ProjectSection(SolutionItems) = preProject
 		LICENSE = LICENSE
+		README.md = README.md
+		To Do.md = To Do.md
 	EndProjectSection
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DNX.Extensions.Benchmarks", "tests\DNX.Extensions.Benchmarks\DNX.Extensions.Benchmarks.csproj", "{D9664527-B415-498F-B8A9-9AF016D7D91F}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -40,6 +44,10 @@ Global
 		{B14EFA70-CA77-4439-9C08-357061B97E4D}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{B14EFA70-CA77-4439-9C08-357061B97E4D}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{B14EFA70-CA77-4439-9C08-357061B97E4D}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D9664527-B415-498F-B8A9-9AF016D7D91F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D9664527-B415-498F-B8A9-9AF016D7D91F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D9664527-B415-498F-B8A9-9AF016D7D91F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D9664527-B415-498F-B8A9-9AF016D7D91F}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -47,6 +55,7 @@ Global
 	GlobalSection(NestedProjects) = preSolution
 		{E2B8F640-BCFE-4BD7-B158-E7FE957A38CB} = {E832563B-3DD6-4CCD-B5DA-91F89AE3B98A}
 		{B14EFA70-CA77-4439-9C08-357061B97E4D} = {27BBD260-1C33-4F57-925A-12AB922D6AB5}
+		{D9664527-B415-498F-B8A9-9AF016D7D91F} = {27BBD260-1C33-4F57-925A-12AB922D6AB5}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {A971C3D4-3729-43C6-88E7-16371F03161F}
diff --git a/To Do.md b/To Do.md
new file mode 100644
index 0000000..d8ccd16
--- /dev/null
+++ b/To Do.md	
@@ -0,0 +1,20 @@
+# TO DO
+
+## Variables with multiple values
+
+- https://github.com/orgs/community/discussions/46785
+
+## Multi Targeting
+
+- https://learn.microsoft.com/en-us/answers/questions/1398343/nuget-how-can-i-make-a-single-nuget-package-target
+- https://runs-on.com/github-actions/the-matrix-strategy/
+- https://github.com/NuGet/setup-nuget
+
+## Better Test Reporting ?
+
+- https://github.com/marketplace/actions/dotnet-test-reporter
+
+## NuGet signing
+
+- https://timheuer.com/blog/use-nuget-with-github-actions-github-packages/
+-
diff --git a/src/DNX.Extensions/DNX.Extensions.csproj b/src/DNX.Extensions/DNX.Extensions.csproj
index c1ca19a..44008b7 100644
--- a/src/DNX.Extensions/DNX.Extensions.csproj
+++ b/src/DNX.Extensions/DNX.Extensions.csproj
@@ -6,6 +6,7 @@
     <Platforms>x64;x86;AnyCPU</Platforms>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <Nullable>disable</Nullable>
+    <IsPackable>true</IsPackable>
   </PropertyGroup>
 
   <PropertyGroup>
@@ -19,11 +20,15 @@
     <PackageIcon>favicon-32x32.png</PackageIcon>
     <PackageIconUrl>https://raw.githubusercontent.com/martinsmith1968/DNX.Extensions/main/images/favicon-32x32.png</PackageIconUrl>
     <PackageReleaseNotes>
-      Interpolation to a working version and some preparation for moving to .NET Standard
+      Migration from DNX.Helpers
     </PackageReleaseNotes>
   </PropertyGroup>
 
   <ItemGroup>
+    <None Include="../../README.md">
+      <Pack>True</Pack>
+      <PackagePath></PackagePath>
+    </None>
     <None Include="../../LICENSE">
       <Pack>True</Pack>
       <PackagePath></PackagePath>
diff --git a/src/DNX.Extensions/IO/DirectoryInfoExtensions.cs b/src/DNX.Extensions/IO/DirectoryInfoExtensions.cs
index ce2b1e5..34cab8b 100644
--- a/src/DNX.Extensions/IO/DirectoryInfoExtensions.cs
+++ b/src/DNX.Extensions/IO/DirectoryInfoExtensions.cs
@@ -94,10 +94,12 @@ public static string GetRelativePath(this DirectoryInfo directoryInfo, Directory
             : GetRelativePath(directoryInfo.FullName, owningDirectoryInfo.FullName)
                 .RemoveStartsWith($".{Path.DirectorySeparatorChar}");
 
+#if NETSTANDARD2_1_OR_GREATER
         if (relativePath == ".")
         {
             relativePath = string.Empty;
         }
+#endif
 
         return relativePath;
     }
diff --git a/tests/DNX.Extensions.Benchmarks/DNX.Extensions.Benchmarks.csproj b/tests/DNX.Extensions.Benchmarks/DNX.Extensions.Benchmarks.csproj
new file mode 100644
index 0000000..fe5b61f
--- /dev/null
+++ b/tests/DNX.Extensions.Benchmarks/DNX.Extensions.Benchmarks.csproj
@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="BenchmarkDotNet" Version="0.14.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\DNX.Extensions\DNX.Extensions.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/tests/DNX.Extensions.Benchmarks/DevelopmentConfig.cs b/tests/DNX.Extensions.Benchmarks/DevelopmentConfig.cs
new file mode 100644
index 0000000..c78f585
--- /dev/null
+++ b/tests/DNX.Extensions.Benchmarks/DevelopmentConfig.cs
@@ -0,0 +1,20 @@
+using System.Diagnostics.CodeAnalysis;
+using BenchmarkDotNet.Configs;
+using BenchmarkDotNet.Exporters;
+
+namespace DNX.Extensions.Benchmarks;
+
+[ExcludeFromCodeCoverage]
+internal class DevelopmentConfig : ManualConfig
+{
+    public DevelopmentConfig()
+    {
+        AddExporter(DefaultConfig.Instance.GetExporters().ToArray());
+        AddLogger(DefaultConfig.Instance.GetLoggers().ToArray());
+        AddColumnProvider(DefaultConfig.Instance.GetColumnProviders().ToArray());
+
+        AddExporter(new HtmlExporter());
+
+        WithOptions(ConfigOptions.DisableOptimizationsValidator);
+    }
+}
diff --git a/tests/DNX.Extensions.Benchmarks/Program.cs b/tests/DNX.Extensions.Benchmarks/Program.cs
new file mode 100644
index 0000000..1c8dac1
--- /dev/null
+++ b/tests/DNX.Extensions.Benchmarks/Program.cs
@@ -0,0 +1,21 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
+using BenchmarkDotNet.Running;
+
+namespace DNX.Extensions.Benchmarks;
+
+[ExcludeFromCodeCoverage]
+public class Program
+{
+    public static void Main()
+    {
+        BenchmarkRunner.Run(
+            Assembly.GetExecutingAssembly(),
+#if DEBUG
+            new DevelopmentConfig()
+#else
+            null
+#endif
+            );
+    }
+}
diff --git a/tests/DNX.Extensions.Benchmarks/Strings/StringExtensionBenchmarks.cs b/tests/DNX.Extensions.Benchmarks/Strings/StringExtensionBenchmarks.cs
new file mode 100644
index 0000000..312ee2d
--- /dev/null
+++ b/tests/DNX.Extensions.Benchmarks/Strings/StringExtensionBenchmarks.cs
@@ -0,0 +1,41 @@
+using System.Diagnostics.CodeAnalysis;
+using BenchmarkDotNet.Attributes;
+using DNX.Extensions.Strings;
+
+namespace DNX.Extensions.Benchmarks.Strings;
+
+[ExcludeFromCodeCoverage]
+[MemoryDiagnoser]
+[MarkdownExporterAttribute.GitHub]
+public class StringExtensionBenchmarks
+{
+    private const string SearchText = nameof(SearchText);
+
+    private string _text = "";
+
+    [Params(100)]
+    public int StartTextSize { get; set; }
+
+    [Params(100)]
+    public int EndTextSize { get; set; }
+
+    [GlobalSetup]
+    public void GlobalSetup()
+    {
+        _text = string.Format(
+            "{0}{1}{2}",
+            new string('-', StartTextSize),
+            SearchText,
+            new string('-', EndTextSize)
+        );
+    }
+
+    [Benchmark]
+    public string Before() => _text.Before(SearchText);
+
+    [Benchmark]
+    public string After() => _text.After(SearchText);
+
+    [Benchmark]
+    public string Reverse() => _text.Reverse();
+}
diff --git a/tests/DNX.Extensions.Tests/DNX.Extensions.Tests.csproj b/tests/DNX.Extensions.Tests/DNX.Extensions.Tests.csproj
index b861842..a05eff9 100644
--- a/tests/DNX.Extensions.Tests/DNX.Extensions.Tests.csproj
+++ b/tests/DNX.Extensions.Tests/DNX.Extensions.Tests.csproj
@@ -7,6 +7,7 @@
     <Platforms>x64;x86;AnyCPU</Platforms>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>disable</Nullable>
+    <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/tests/DNX.Extensions.Tests/IO/DirectoryInfoExtensionsTests.cs b/tests/DNX.Extensions.Tests/IO/DirectoryInfoExtensionsTests.cs
index f511b91..9055c00 100644
--- a/tests/DNX.Extensions.Tests/IO/DirectoryInfoExtensionsTests.cs
+++ b/tests/DNX.Extensions.Tests/IO/DirectoryInfoExtensionsTests.cs
@@ -246,6 +246,7 @@ public static TheoryData<string, string, string> GetRelativePath_Data()
             {
                 { Path.Combine(Path.GetTempPath(), guid1), null, null },
                 { null, Path.Combine(Path.GetTempPath(), guid1), null },
+                { Path.Combine(Path.GetTempPath(), guid1), Path.Combine(Path.GetTempPath(), guid1), "" },
                 { Path.Combine(Path.GetTempPath(), guid1), Path.Combine(Path.GetTempPath(), "abcdefg"), Path.Join("..", guid1) },
                 { Path.Combine(Path.GetTempPath(), guid2), Path.Combine(Path.GetTempPath(), guid3), Path.Join("..", guid2) },
                 { Path.Combine(Path.GetTempPath(), "abcdefg"), Path.Combine(Path.GetTempPath(), "abcdefg"), "" },