运行.NET 9控制台应用时提示缺失hostpolicy.dll的问题求助

各位大佬好，我最近在折腾.NET 9控制台应用的时候碰到了一个棘手的问题，想请大家帮忙看看。

当我运行控制台应用时，直接弹出了下面的错误提示：

A fatal error was encountered. The library 'hostpolicy.dll' required to execute the application was not found in 'C:\Program Files\dotnet'.
Failed to run as a self-contained app. The application was run as a self-contained app because 'C:\Users\erikw\source\repos\MainDict2\MainDict2\bin\x64\Debug\net9.0\MainDict2.runtimeconfig.json' did not specify a framework.
If this should be a framework-dependent app, specify the appropriate framework in 'C:\Users\erikw\source\repos\MainDict2\MainDict2\bin\x64\Debug\net9.0\MainDict2.runtimeconfig.json'.

这是我的主项目文件内容：

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net9.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
    <DisableImplicitFrameworkReferences>true</DisableImplicitFrameworkReferences>
    <Platforms>AnyCPU;x64</Platforms>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Extensions.DotNetDeltaApplier">
      <HintPath>..\..\..\..\..\..\Program Files\dotnet\sdk\9.0.302\DotnetTools\dotnet-watch\9.0.302-servicing.25319.7\tools\net9.0\any\hotreload\Microsoft.Extensions.DotNetDeltaApplier.dll</HintPath>
    </Reference>
    <Reference Include="System.Collections">
      <HintPath>..\..\..\..\..\..\Program Files\dotnet\shared\Microsoft.NETCore.App\9.0.7\System.Collections.dll</HintPath>
    </Reference>
    <Reference Include="System.Collections.Concurrent">
      <HintPath>..\..\..\..\..\..\Program Files\dotnet\shared\Microsoft.NETCore.App\9.0.7\System.Collections.Concurrent.dll</HintPath>
    </Reference>
    <Reference Include="System.Console">
      <HintPath>..\..\..\..\..\..\Program Files\dotnet\shared\Microsoft.NETCore.App\9.0.7\System.Console.dll</HintPath>
    </Reference>
    <Reference Include="System.IO.Pipes">
      <HintPath>..\..\..\..\..\..\Program Files\dotnet\shared\Microsoft.NETCore.App\9.0.7\System.IO.Pipes.dll</HintPath>
    </Reference>
    <Reference Include="System.Linq">
      <HintPath>..\..\..\..\..\..\Program Files\dotnet\shared\Microsoft.NETCore.App\9.0.7\System.Linq.dll</HintPath>
    </Reference>
    <Reference Include="System.Net.Http">
      <HintPath>..\..\..\..\..\..\Program Files\dotnet\shared\Microsoft.NETCore.App\9.0.7\System.Net.Http.dll</HintPath>
    </Reference>
    <Reference Include="System.Private.CoreLib">
      <HintPath>..\..\..\..\..\..\Program Files\dotnet\shared\Microsoft.NETCore.App\9.0.7\System.Private.CoreLib.dll</HintPath>
    </Reference>
    <Reference Include="System.Runtime">
      <HintPath>..\..\..\..\..\..\Program Files\dotnet\shared\Microsoft.NETCore.App\9.0.7\System.Runtime.dll</HintPath>
    </Reference>
    <Reference Include="System.Runtime.InteropServices">
      <HintPath>..\..\..\..\..\..\Program Files\dotnet\shared\Microsoft.NETCore.App\9.0.7\System.Runtime.InteropServices.dll</HintPath>
    </Reference>
    <Reference Include="System.Text.Encoding.Extensions">
      <HintPath>..\..\..\..\..\..\Program Files\dotnet\shared\Microsoft.NETCore.App\9.0.7\System.Text.Encoding.Extensions.dll</HintPath>
    </Reference>
    <Reference Include="System.Threading">
      <HintPath>..\..\..\..\..\..\Program Files\dotnet\shared\Microsoft.NETCore.App\9.0.7\System.Threading.dll</HintPath>
    </Reference>
  </ItemGroup>
</Project>

这里我要说明下，我特意开启了<DisableImplicitFrameworkReferences>true</DisableImplicitFrameworkReferences>，因为我替换了自定义的System.Private.CoreLib.dll（修改了里面的Dictionary.cs泛型类），这一切都是为了跟着《Programming C# 10.0》这本书里的例子折腾学习用的。

我试过直接引用hostpolicy.dll，但系统提示“引用无效或不被支持”，现在完全不知道该怎么解决这个问题了，有没有大佬能给我点建议？谢谢大家！

内容来源于stack exchange