Upgrade to net9

Directory.Build.props

@@ -84,7 +84,8 @@
     -->
     <Otherwise>
       <PropertyGroup>
-        <DefaultNetCoreTargetFramework>net8.0</DefaultNetCoreTargetFramework>
+        <DefaultNetCoreTargetFramework Condition="'$(IsVSCodeOnly)' == 'true'">net9.0</DefaultNetCoreTargetFramework>
+        <DefaultNetCoreTargetFramework Condition="'$(IsVSCodeOnly)' != 'true'">net8.0</DefaultNetCoreTargetFramework>
         <DefaultNetCoreTargetFrameworks>$(DefaultNetCoreTargetFramework)</DefaultNetCoreTargetFrameworks>
       </PropertyGroup>
     </Otherwise>

src/Razor/benchmarks/Microsoft.AspNetCore.Razor.Microbenchmarks/Resources.cs

@@ -62,7 +62,12 @@ public static byte[] GetResourceBytes(string name, string? folder = null)
             using var stream = GetResourceStream(name, folder);
 
             value = new byte[stream.Length];
+
+#if NET
+            stream.ReadExactly(value);
+#else
             stream.Read(value, 0, value.Length);
+#endif
 
             s_bytesMap.Add(key, value);
 

src/Razor/src/Microsoft.AspNetCore.Razor.ProjectEngineHost/Utilities/StreamExtensions.NetCore.cs

@@ -103,7 +103,7 @@ public static void WriteSize(this Stream stream, int length)
     public unsafe static int ReadSize(this Stream stream)
     {
         Span<byte> bytes = stackalloc byte[4];
-        stream.Read(bytes);
+        stream.ReadExactly(bytes);
         return BitConverter.ToInt32(bytes);
     }
 }

src/Razor/src/Microsoft.VisualStudio.DevKit.Razor/Microsoft.VisualStudio.DevKit.Razor.csproj

@@ -7,6 +7,7 @@
     <EnableApiCheck>false</EnableApiCheck>
     <IsShippingPackage>true</IsShippingPackage>
     <IsPackable>true</IsPackable>
+    <IsVSCodeOnly>true</IsVSCodeOnly>
 
     <!-- This is not a standard nuget package and only consumed by the extension build. We don't care if the folder structure doesn't match what nuget expects. -->
     <NoWarn>$(NoWarn);NU5100</NoWarn>

src/Razor/src/rzls/rzls.csproj

@@ -9,6 +9,7 @@
     <EnableApiCheck>false</EnableApiCheck>
     <IsShippingPackage>true</IsShippingPackage>
     <RollForward>LatestMajor</RollForward>
+    <IsVSCodeOnly>true</IsVSCodeOnly>
     <!--
         Build a nuget package for this project.  This is not consumed as a standard NuGet package; it just
     contains

src/Razor/test/Microsoft.AspNetCore.Razor.Test.Common.Tooling/RazorTestResources.cs

@@ -69,7 +69,12 @@ public static byte[] GetResourceBytes(string name, string? folder = null)
             using var stream = GetResourceStream(name, folder);
 
             value = new byte[stream.Length];
+
+#if NET
+            stream.ReadExactly(value);
+#else
             stream.Read(value, 0, value.Length);
+#endif
 
             s_bytesMap.Add(key, value);