diff --git a/src/Servers/HttpSys/src/Microsoft.AspNetCore.Server.HttpSys.csproj b/src/Servers/HttpSys/src/Microsoft.AspNetCore.Server.HttpSys.csproj
index 501aa01125..dabe46a33b 100644
--- a/src/Servers/HttpSys/src/Microsoft.AspNetCore.Server.HttpSys.csproj
+++ b/src/Servers/HttpSys/src/Microsoft.AspNetCore.Server.HttpSys.csproj
@@ -15,6 +15,7 @@
     <Compile Include="$(SharedSourceRoot)HttpSys\**\*.cs" />
     <Compile Include="$(SharedSourceRoot)Buffers.MemoryPool\*.cs" LinkBase="MemoryPool" />
     <Compile Include="$(SharedSourceRoot)ServerInfrastructure\*.cs" LinkBase="ServerInfrastructure" />
+    <Compile Include="$(SharedSourceRoot)TaskToApm.cs" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/Servers/Kestrel/Core/src/Internal/Infrastructure/HttpUtilities.cs b/src/Servers/Kestrel/Core/src/Internal/Infrastructure/HttpUtilities.cs
index 39f38b4e21..ede9d52e2e 100644
--- a/src/Servers/Kestrel/Core/src/Internal/Infrastructure/HttpUtilities.cs
+++ b/src/Servers/Kestrel/Core/src/Internal/Infrastructure/HttpUtilities.cs
@@ -120,6 +120,12 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Infrastructure
             }
         }
 
+        public static string GetAsciiOrUTF8StringNonNullCharacters(this Span<byte> span)
+            => GetAsciiOrUTF8StringNonNullCharacters((ReadOnlySpan<byte>)span);
+
+        public static string GetAsciiOrUTF8StringNonNullCharacters(this ReadOnlySpan<byte> span)
+            => StringUtilities.GetAsciiOrUTF8StringNonNullCharacters(span, HeaderValueEncoding);
+
         private static unsafe void GetAsciiStringNonNullCharacters(Span<char> buffer, IntPtr state)
         {
             fixed (char* output = &MemoryMarshal.GetReference(buffer))
@@ -133,7 +139,7 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Infrastructure
             }
         }
 
-        public static string GetRequestHeaderStringNonNullCharacters(this Span<byte> span, bool useLatin1) =>
+        public static string GetRequestHeaderStringNonNullCharacters(this ReadOnlySpan<byte> span, bool useLatin1) =>
             useLatin1 ? span.GetLatin1StringNonNullCharacters() : span.GetAsciiOrUTF8StringNonNullCharacters(HeaderValueEncoding);
 
         public static string GetAsciiStringEscaped(this ReadOnlySpan<byte> span, int maxChars)
diff --git a/src/Servers/Kestrel/Core/src/Microsoft.AspNetCore.Server.Kestrel.Core.csproj b/src/Servers/Kestrel/Core/src/Microsoft.AspNetCore.Server.Kestrel.Core.csproj
index 59c2a87e41..5694b9d2b7 100644
--- a/src/Servers/Kestrel/Core/src/Microsoft.AspNetCore.Server.Kestrel.Core.csproj
+++ b/src/Servers/Kestrel/Core/src/Microsoft.AspNetCore.Server.Kestrel.Core.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <Description>Core components of ASP.NET Core Kestrel cross-platform web server.</Description>
@@ -20,9 +20,8 @@
     <Compile Include="$(SharedSourceRoot)runtime\Http2\**\*.cs" Link="Shared\runtime\Http2\%(Filename)%(Extension)" />
     <Compile Include="$(SharedSourceRoot)runtime\Http3\**\*.cs" Link="Shared\runtime\Http3\%(Filename)%(Extension)" />
     <Compile Include="$(SharedSourceRoot)Hpack\**\*.cs" Link="Shared\Hpack\%(Filename)%(Extension)" />
-    <Compile Include="$(SharedSourceRoot)ServerInfrastructure\**\*.cs" LinkBase="Shared\" />
-    <Compile Include="$(RepoRoot)src\Shared\TaskToApm.cs" Link="Internal\TaskToApm.cs" />
     <Compile Include="$(SharedSourceRoot)ServerInfrastructure\**\*.cs" />
+    <Compile Include="$(RepoRoot)src\Shared\TaskToApm.cs" Link="Internal\TaskToApm.cs" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/Shared/Http2cat/Http2Utilities.cs b/src/Shared/Http2cat/Http2Utilities.cs
index b320850eaa..0cc3a77cf3 100644
--- a/src/Shared/Http2cat/Http2Utilities.cs
+++ b/src/Shared/Http2cat/Http2Utilities.cs
@@ -168,7 +168,7 @@ namespace Microsoft.AspNetCore.Http2Cat
             return asciiString;
         }
 
-        public unsafe string GetAsciiOrUTF8StringNonNullCharacters(ReadOnlySpan<byte> span)
+        public unsafe string GetAsciiOrUTF8StringNonNullCharacters(this ReadOnlySpan<byte> span)
         {
             if (span.IsEmpty)
             {
diff --git a/src/Shared/ServerInfrastructure/StringUtilities.cs b/src/Shared/ServerInfrastructure/StringUtilities.cs
index 0d556f9fe4..8f6b01027a 100644
--- a/src/Shared/ServerInfrastructure/StringUtilities.cs
+++ b/src/Shared/ServerInfrastructure/StringUtilities.cs
@@ -16,7 +16,7 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Infrastructure
     internal static class StringUtilities
     {
         private static string GetAsciiOrUTF8StringNonNullCharacters(this Span<byte> span, Encoding defaultEncoding)
-            => GetAsciiOrUTF8StringNonNullCharacters((ReadOnlySpan<byte>)span);
+            => GetAsciiOrUTF8StringNonNullCharacters((ReadOnlySpan<byte>)span, defaultEncoding);
 
         public static unsafe string GetAsciiOrUTF8StringNonNullCharacters(this ReadOnlySpan<byte> span, Encoding defaultEncoding)
         {
@@ -50,11 +50,8 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Infrastructure
 
                 return resultString;
             }
-
-            return resultString;
         }
 
-
         private static readonly SpanAction<char, IntPtr> s_getAsciiOrUtf8StringNonNullCharacters = GetAsciiOrUTF8StringNonNullCharacters;
 
         private static unsafe void GetAsciiOrUTF8StringNonNullCharacters(Span<char> buffer, IntPtr state)
@@ -71,7 +68,7 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Infrastructure
             }
         }
 
-        public static unsafe string GetLatin1StringNonNullCharacters(this Span<byte> span)
+        public static unsafe string GetLatin1StringNonNullCharacters(this ReadOnlySpan<byte> span)
         {
             if (span.IsEmpty)
             {