Merging multiple CSV files into one using PowerShell

Question

Hello I\'m looking for powershell script which would merge all csv files in a directory into one text file (.txt) . All csv files have same header which is always stored in

Answer 1

Here is a version also using System.IO.File,

$result = "c:\temp\result.txt"
$csvs = get-childItem "c:\temp\*.csv" 
#read and write CSV header
[System.IO.File]::WriteAllLines($result,[System.IO.File]::ReadAllLines($csvs[0])[0])
#read and append file contents minus header
foreach ($csv in $csvs)  {
    $lines = [System.IO.File]::ReadAllLines($csv)
    [System.IO.File]::AppendAllText($result, ($lines[1..$lines.Length] | Out-String))
}