MSBuild,我怎样才能得到第二个 parent

MSBuild, how can I get the second parent

MSBuild(目标文件),如何获取这样的地址的第二个 parent?

  <PropertyGroup>
    <LibFolder>$([System.IO.Directory]::GetParent($(MSBuildProjectDirectory)))</LibFolder>
  </PropertyGroup>

这是一级parent,我怎样才能获得二级? (parent 的Parent)

再次调用该函数,在之前的结果上:

  <PropertyGroup>
    <LibFolder>$([System.IO.Directory]::GetParent($(MSBuildProjectDirectory)))</LibFolder>
    <LibFolder>$([System.IO.Directory]::GetParent($(LibFolder)))</LibFolder>
  </PropertyGroup>