Param(
  [Parameter(Mandatory=$true)][string]$sourceDirectory,
  [Parameter(Mandatory=$true)][string]$outputFile
  )

#$sourceDirectory = "c:\temp\container-builder\"
#$outputFile = "c:\temp\container.txt"

$files= Get-ChildItem $sourceDirectory -Filter *.dll

foreach($file in $files)
{
    Add-Content $outputFile "$file.Name $($file.VersionInfo.FileVersion) $($file.VersionInfo.ProductVersion)"
}