hithread.csproj

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net7.0</TargetFramework>
    <RuntimeIdentifier>browser-wasm</RuntimeIdentifier>
    <WasmMainJSPath>main.js</WasmMainJSPath>
    <OutputType>Exe</OutputType>
    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
    <!-- use the threaded build of the .NET runtime for WebAssembly -->
    <WasmEnableThreads>true</WasmEnableThreads>
  </PropertyGroup>

  <!-- optional. Trimming and aot compilation work with threading -->
  <PropertyGroup Condition="true">
    <PublishTrimmed>true</PublishTrimmed>
    <RunAOTCompilation>true</RunAOTCompilation>
  </PropertyGroup>

  <ItemGroup>
    <WasmExtraFilesToDeploy Include="index.html" />
    <WasmExtraFilesToDeploy Include="main.js" />
  </ItemGroup>

  <ItemGroup>
    <!-- provides reference assemblies that will prevent warnings about new Thread() and other threading APIs being unavailable on the browser -->
    <PackageReference Include="Microsoft.NET.WebAssembly.Threading" Version="7.0.0-rc.2.*" />
  </ItemGroup>
</Project>