Powershell function to convert a multiline string to a single line string with line break characters

Convert-MultilineToSingleLine.ps1

# Powershell function to convert a multiline string to a single line string with line break characters
#
# Example usage:
#   # Replace line breaks with \r\n (Windows-style line endings)
#   cat 'nginx.cer' | Convert-MultilineToSingleLine
#   # Replace line breaks with \n (Unix/Linux-style line endings)
#   cat 'nginx.cer' | Convert-MultilineToSingleLine -n

function Convert-MultilineToSingleLine {
  Param(
	  [Parameter(ValueFromPipeline=$True,Mandatory=$True)]
	  [string]$multilineString,
	  [switch]$nixEnd = $False
  )
  begin {
	  $fullPipeline = ""
	  $linebreak = "\r\n"
	  if ($nixEnd) {
	    $linebreak = "\n"
	  }
  }
  process { $fullPipeline += $multilineString + $linebreak }
  end { $fullPipeline }
}