Unable to remove 'r'n from file

Question

Currently have a folder with numerous files.  Each of these files needs to have the CRLF removed from the end of each line.
line1
line2
line3
results
line1line2line3
the follow code, doesn't produce any error, but doesn't replace them;
get-childitem -File 'pathofdirectory' |
 select -expand fullname |
  foreach {
            (Get-Content $_) -replace "`r`n", '' |
             Set-Content $_            
why is this not replacing the CRLF with nothing?

Answer 1

Add-content "C:\Test.txt" "Line1"
Add-content "C:\Test.txt" "Line2"
Add-content "C:\Test.txt" "Line3"
Add-content "C:\Test.txt" "Line4"
get-childitem 'C:\Test.txt' |
select -expand fullname |
foreach {
$Lines = (Get-Content $_)
$S=""
$Lines | % { $S += $_}
[System.IO.File]::WriteAllBytes($_,(([system.Text.Encoding]::ASCII).GetBytes($S)))
Get-Item C:\Test.Txt
Get-Content C:\Test.txt
Directory: C:\
Mode LastWriteTime Length Name
-a--- 06/11/2014 12:00 PM 20 Test.Txt
Line1Line2Line3Line4
No CRLF at end, file length should be 20