add-commonassemblyinfo.ps1

Task Add-CommonAssemblyInfo {
  
    dir . -Recurse -filter *.csproj | Select-Object -first 2 | % { 
      
      $content = [xml](gc $_.FullName); 
      
      $ns = New-Object System.Xml.XmlNamespaceManager -ArgumentList $content.NameTable
      $ns.AddNamespace('a', 'http://schemas.microsoft.com/developer/msbuild/2003')
      
      $assemblyInfoNode = $content.SelectNodes("//a:Compile[@Include='Properties\AssemblyInfo.cs']", $ns) | select-object -first 1; 
      $depth = $_.FullName.Split("\").Length - 4;
      $commonNode = $content.CreateElement("Compile"); 
      $commonNode.SetAttribute("Include","..\" * $depth + "CommonAssemblyInfo.cs"); 
      $linkNode = $content.CreateElement("Link"); 
      $linkNode.InnerText = "Properties\CommonAssemblyInfo.cs"; 
      $commonNode.AppendChild($linkNode); 
      $assemblyInfoNode.ParentNode.InsertAfter($commonNode, $assemblyInfoNode); 
      $content.Save($_.FullName); 
    }
  
  }