remove empty lines from text file with PowerShell

Question

I know that I can use:

gc c:\\FileWithEmptyLines.txt | where {$_ -ne \"\"} > c:\\FileWithNoEmptyLines.txt

to remove empty lines. But How

Answer 1

This will remove empty lines or lines with only whitespace characters (tabs/spaces).

[IO.File]::ReadAllText("FileWithEmptyLines.txt") -replace '\s+\r\n+', "`r`n" | Out-File "c:\FileWithNoEmptyLines.txt"