$directory = "bin\x86\Debug" 
$references = $null
$references= Get-ChildItem $directory -Filter *.dll -rec | % {
    try
    {
        $loaded = [reflection.assembly]::LoadFrom($_.FullName)
        $name    = $loaded.ManifestModule
        $loaded.GetReferencedAssemblies() | % {
            $toAdd='' | select Who, FullName, Name, Version
            $toAdd.Who, $toAdd.FullName, $toAdd.Name, $toAdd.Version = `
                $loaded,$_.FullName,$_.Name,$_.Version
            $toAdd
        } 
    }
    catch [Exception]
    {       
        Write-Host $_.Exception.Message
    }
}

$hash = $references | Group-Object Name, Version -AsString -AsHashTable

$hash.GetEnumerator() | Sort-Object Name | % { 
    $key = $_.Key.ToString().Trim()
    $value = $_.Value
    Write-Host $key
    $s = [string]::join([Environment]::NewLine + '   * ', ($value | Select-Object -ExpandProperty Who | Get-Unique | Sort-Object Who))
    Write-Host '   *', $s
}