C# 自己的组件生成Nuget包，组件里的内容（dll等）设置了复制到输出目录，但是引用该Nuget包后生成路径并没有相应的内容

例如组件A项目中想把以下dll拷贝都输出目录，

 已经设置了复制到输出目录。

然后项目B通过Nuget包引入了组件A，然后项目B生成路径下并没有这几个opencv的dll。

经过组内大佬 唐宋元明清2188 的研究

需要在组件A的项目文件中给每个dll内容连接添加

<PackageCopyToOutput>true</PackageCopyToOutput>

<ItemGroup>
    <Content Include="dll\x64\OpenCvSharpExtern.dll">
        <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
        <PackageCopyToOutput>true</PackageCopyToOutput>
    </Content>
    <Content Include="dll\x64\opencv_ffmpeg400_64.dll">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
　　　　<PackageCopyToOutput>true</PackageCopyToOutput>
    </Content>
    <Content Include="dll\x86\OpenCvSharpExtern.dll">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
　　　　<PackageCopyToOutput>true</PackageCopyToOutput>
    </Content>
    <Content Include="dll\x86\opencv_ffmpeg400.dll">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
　　　　<PackageCopyToOutput>true</PackageCopyToOutput>
    </Content>
  </ItemGroup>