Published Blazor Hybrid project missing staticwebassets.runtime.json

Question

I published a blazor hybrid on WPF project (.net 9.0, created by following this instruction https://learn.microsoft.com/en-us/aspnet/core/blazor/hybrid/tutorials/wpf?view=aspnetcore-9.0), but there is no staticwebassets.runtime.json in that target publishing folder, so all my js lib and css cannot be read.

I can copy the file from bin folder and modify ContentRoots manually. Is there a way to generate this file automatically when publishing it?

csproj:

<Project Sdk="Microsoft.NET.Sdk.Razor">

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>net9.0-windows</TargetFramework>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
    <UseWPF>true</UseWPF>
    <RootNamespace>MyProject</RootNamespace>
    <GenerateStaticWebAssetsManifest>true</GenerateStaticWebAssetsManifest>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Components.WebView.Wpf" Version="9.0.40" />
    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.2" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.2">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="9.0.2" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="9.0.2">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.2" />
    <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="9.0.2" />
  </ItemGroup>

</Project>

Published by visual studio with this pubxml config file :

<?xml version="1.0" encoding="utf-8"?>
<!--
https://go.microsoft.com/fwlink/?LinkID=208121.
-->
<Project>
  <PropertyGroup>
    <Configuration>Release</Configuration>
    <Platform>Any CPU</Platform>
    <PublishDir>D:\MyProject\publish\</PublishDir>
    <PublishProtocol>FileSystem</PublishProtocol>
    <_TargetId>Folder</_TargetId>
    <TargetFramework>net9.0-windows</TargetFramework>
    <SelfContained>false</SelfContained>
  </PropertyGroup>
</Project>

The problem seems only exist on .net 9.0. Downgrading program to .net 8.0 with the csproj below solves the problem:

<Project Sdk="Microsoft.NET.Sdk.Razor">

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>net8.0-windows</TargetFramework>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
    <UseWPF>true</UseWPF>
    <RootNamespace>MyProject</RootNamespace>
    <GenerateStaticWebAssetsManifest>true</GenerateStaticWebAssetsManifest>
    <StaticWebAssetsBasePath>_content/$(MSBuildProjectName)</StaticWebAssetsBasePath>
    <ApplicationIcon>Assets\TM.ico</ApplicationIcon>
  </PropertyGroup>


  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Components.WebView.Wpf" Version="8.0.100" />
    <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="8.0.13" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.13">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="8.0.13" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="8.0.13">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.1" />
    <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="8.0.1" />
  </ItemGroup>
    

</Project>