Updated for .NET 9.

.github/workflows/dotnetcore.yml

@@ -9,7 +9,9 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: |
+            8.0.x
+            9.0.x
     - name: Restore Dependencies
       run: dotnet restore
     # Debug and Release might be different due to conditional compilation, so validate both.

WebAssembly.Tests/WebAssembly.Tests.csproj

@@ -1,8 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>    
-    <TargetFramework>net8.0</TargetFramework>
-    <LangVersion>12.0</LangVersion>
+    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
+    <LangVersion>13.0</LangVersion>
     <RootNamespace>WebAssembly</RootNamespace>
     <Nullable>enable</Nullable>
     <TreatWarningsAsErrors>True</TreatWarningsAsErrors>

WebAssembly/WebAssembly.csproj

@@ -1,8 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <!-- I'd prefer to set a much older .NET Core as the baseline but it's not currently worth the inconvenience. -->
-    <TargetFrameworks>net8.0;netstandard2.0</TargetFrameworks>
+    <!-- .NET Standard 2.0 is very old but (so far) can still be built by the newest .NET SDK, so it makes a great baseline. -->
+    <TargetFrameworks>netstandard2.0;net8.0;net9.0</TargetFrameworks>
     <Title>WebAssembly for .NET</Title>
     <AssemblyTitle>WebAssembly for .NET</AssemblyTitle>
     <Authors>Ryan Lamansky</Authors>
@@ -13,7 +13,7 @@
     <PackageProjectUrl>https://github.com/RyanLamansky/dotnet-webassembly</PackageProjectUrl>
     <Copyright>Copyright © Ryan Lamansky. All rights reserved.</Copyright>
     <PackageTags>WebAssembly WASM JIT</PackageTags>
-    <LangVersion>12.0</LangVersion>
+    <LangVersion>13.0</LangVersion>
     <Nullable>enable</Nullable>
     <RepositoryUrl>https://github.com/RyanLamansky/dotnet-webassembly</RepositoryUrl>
     <RepositoryType>git</RepositoryType>