diff --git a/.github/workflows/build_nupkg.yml b/.github/workflows/build_nupkg.yml
index 5f3d34a..3b2c1a1 100644
--- a/.github/workflows/build_nupkg.yml
+++ b/.github/workflows/build_nupkg.yml
@@ -16,7 +16,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 9.0.x
         
     - name: Restore dependencies
       run: dotnet restore
diff --git a/.github/workflows/check_pr.yml b/.github/workflows/check_pr.yml
index bba92af..fad7fe2 100644
--- a/.github/workflows/check_pr.yml
+++ b/.github/workflows/check_pr.yml
@@ -11,7 +11,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 9.0.x
       
     - name: Build
       run: dotnet build
\ No newline at end of file
diff --git a/SabreTools.Matching.Test/SabreTools.Matching.Test.csproj b/SabreTools.Matching.Test/SabreTools.Matching.Test.csproj
index fdfa519..4818362 100644
--- a/SabreTools.Matching.Test/SabreTools.Matching.Test.csproj
+++ b/SabreTools.Matching.Test/SabreTools.Matching.Test.csproj
@@ -1,29 +1,30 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
-  <PropertyGroup>
-    <TargetFrameworks>net6.0;net8.0</TargetFrameworks>
-    <IsPackable>false</IsPackable>
-    <LangVersion>latest</LangVersion>
-    <Nullable>enable</Nullable>
-    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
-  </PropertyGroup>
-  
-  <ItemGroup>
-    <PackageReference Include="coverlet.collector" Version="6.0.0">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
-    <PackageReference Include="xunit" Version="2.6.2" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.4">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-  </ItemGroup>
-  
-  <ItemGroup>
-    <ProjectReference Include="..\SabreTools.Matching\SabreTools.Matching.csproj" />
-  </ItemGroup>
-  
+    <PropertyGroup>
+        <TargetFrameworks>net6.0;net8.0;net9.0</TargetFrameworks>
+        <IsPackable>false</IsPackable>
+        <LangVersion>latest</LangVersion>
+        <Nullable>enable</Nullable>
+        <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+        <WarningsNotAsErrors>NU1903</WarningsNotAsErrors>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="coverlet.collector" Version="6.0.0">
+            <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+            <PrivateAssets>all</PrivateAssets>
+        </PackageReference>
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+        <PackageReference Include="xunit" Version="2.6.2" />
+        <PackageReference Include="xunit.runner.visualstudio" Version="2.5.4">
+            <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+            <PrivateAssets>all</PrivateAssets>
+        </PackageReference>
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\SabreTools.Matching\SabreTools.Matching.csproj" />
+    </ItemGroup>
+
 </Project>
   
\ No newline at end of file
diff --git a/SabreTools.Matching/Delegates.cs b/SabreTools.Matching/Delegates.cs
index 943d4fd..bd8818f 100644
--- a/SabreTools.Matching/Delegates.cs
+++ b/SabreTools.Matching/Delegates.cs
@@ -1,4 +1,3 @@
-using System;
 using System.Collections.Generic;
 using System.IO;
 
diff --git a/SabreTools.Matching/SabreTools.Matching.csproj b/SabreTools.Matching/SabreTools.Matching.csproj
index 880c233..f47a444 100644
--- a/SabreTools.Matching/SabreTools.Matching.csproj
+++ b/SabreTools.Matching/SabreTools.Matching.csproj
@@ -2,7 +2,7 @@
 
     <PropertyGroup>
         <!-- Assembly Properties -->
-        <TargetFrameworks>net20;net35;net40;net452;net462;net472;net48;netcoreapp3.1;net5.0;net6.0;net7.0;net8.0</TargetFrameworks>
+        <TargetFrameworks>net20;net35;net40;net452;net462;net472;net48;netcoreapp3.1;net5.0;net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
         <LangVersion>latest</LangVersion>
         <Nullable>enable</Nullable>
         <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
@@ -18,6 +18,7 @@
         <RepositoryType>git</RepositoryType>
         <PackageTags>byte array stream match matching</PackageTags>
         <PackageLicenseExpression>MIT</PackageLicenseExpression>
+        <WarningsNotAsErrors>NU1903</WarningsNotAsErrors>
     </PropertyGroup>
 
     <!-- Support All Frameworks -->
@@ -27,11 +28,11 @@
     <PropertyGroup Condition="$(TargetFramework.StartsWith(`netcoreapp`)) OR $(TargetFramework.StartsWith(`net5`))">
         <RuntimeIdentifiers>win-x86;win-x64;win-arm64;linux-x64;linux-arm64;osx-x64</RuntimeIdentifiers>
     </PropertyGroup>
-    <PropertyGroup Condition="$(TargetFramework.StartsWith(`net6`)) OR $(TargetFramework.StartsWith(`net7`)) OR $(TargetFramework.StartsWith(`net8`))">
+    <PropertyGroup Condition="$(TargetFramework.StartsWith(`net6`)) OR $(TargetFramework.StartsWith(`net7`)) OR $(TargetFramework.StartsWith(`net8`)) OR $(TargetFramework.StartsWith(`net9`))">
         <RuntimeIdentifiers>win-x86;win-x64;win-arm64;linux-x64;linux-arm64;osx-x64;osx-arm64</RuntimeIdentifiers>
     </PropertyGroup>
     <PropertyGroup Condition="$(RuntimeIdentifier.StartsWith(`osx-arm`))">
-        <TargetFrameworks>net6.0;net7.0;net8.0</TargetFrameworks>
+        <TargetFrameworks>net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
     </PropertyGroup>
 
     <ItemGroup>