function AddFileToClipboard{
    param([string] $FilePath)
    $files = [System.Collections.Specialized.StringCollection]::new()
    $files.Add($FilePath) > $null
    [System.Windows.Clipboard]::SetFileDropList($files)
}

function Clipboard{
    param(
        [Parameter(ValueFromPipeline=$true, Mandatory=$false)]
        [AllowNull()]
        $In = $null
    )
    begin{
        $Value = $null
    }
    process{
        if($null -eq $Value){
            $Value = $In
        }elseif($Value -is [System.Collections.ArrayList]){
            $Value.Add($In) > $null
        }else{
            $cache = $Value
            $Value = [System.Collections.ArrayList]::new()
            $Value.Add($cache) > $null
            $Value.Add($In) > $null
        }
    }
    end{
        if ($null -ne $Value) {
            if($isWindows){
                if($Value -is [System.IO.FileSystemInfo]){
                    AddFileToClipboard $Value.FullName
                    return
                }elseif($Value -is [System.Collections.IEnumerable]){
                    $allFiles = $true
                    $counter = 0
                    $lastFile = $null
                    foreach($file in $Value){
                        if(-not($file -is [System.IO.FileSystemInfo])){
                            $allFiles = $false
                            break;
                        }else{
                            $lastFile = $file
                            $counter += 1
                        }
                    }
                    if($counter -eq 1){
                        AddFileToClipboard $lastFile.FullName
                        return
                    }elseif($allFiles){
                        $sameParent = $true
                        $parentDir = Split-Path -Parent $lastFile.FullName
                        foreach($file in $Value){
                            $currentParentDir = (Split-Path -Parent $file.FullName)
                            if($parentDir -ne $currentParentDir){
                                $sameParent = $false
                                break;
                            }
                        }
                        if($sameParent){
                            AddFileToClipboard $parentDir
                            return
                        }
                    }
                }
            }
            try{
                Set-Clipboard -Value $Value
            }catch{
                Set-Clipboard -Value $Value.ToString()
            }
            return
        }
        $content = Get-Clipboard
        if($content -ne ""){
            return $content
        }
        if(-not $isWindows){
            return ""
        }
        $content = [System.Windows.Clipboard]::GetFileDropList()
        if($null -ne $content){
            return $content | map {fileref $_}
        }
        return ""
    }

}