List of nodes in a specific node in a .csproj file with Powershell

I would like to ask for some help because I am completely lost.

I would like to check if the nodes in a certain part of the .csproj files contain correct data or not. In the below xml snippet, I would like to return the "title" value in the PropertyGroup relative to the "Debug | x64" profile.

snippet of csproj file

<?xml version="1.0" encoding="utf-8"?>
  <Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
    <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
    <PropertyGroup>
    ...
    </PropertyGroup>
    <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x64'">
      <DebugSymbols>true</DebugSymbols>
      <OutputPath>bin\x64\Debug\</OutputPath>
      <DefineConstants>DEBUG;TRACE</DefineConstants>
      <DebugType>full</DebugType>
      <PlatformTarget>x64</PlatformTarget>
      <ErrorReport>prompt</ErrorReport>
      <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
      <!-- nuget stuff -->
      <title>Pet Project</title>
    </PropertyGroup>

      

        
        
        
      

    

Here is my powershell code:

function GetConfigPlatformNodeFromProjectFile($projectFile, $nodeIdentifier) {

    [xml] $pFile = Get-Content $projectFile
    $ns = New-Object System.Xml.XmlNamespaceManager -ArgumentList $pFile.NameTable
    $ns.AddNamespace("ns", $pFile.Project.GetAttribute("xmlns"))

    $nodes = $pFile.SelectNodes("//ns:Project/PropertyGroup[contains(@Condition,'Debug|x64')]", $ns)

    foreach($node in $nodes) {
        write-Host "node... " $node
    }
}

      

        
        
        
      

    

The problem is that $ node will always be 0. According to the articles here, it should contain more. The path is fine. I have checked many times. The xmlns attribute is returned correctly. I think the problem is with the xpath and namespace itself, however I have checked it repeatedly with other XPath tools.

I don't know what I am doing wrong in this case.

Thanks for any help in advance!

Andras