Prepend data to each line in text file

##Prepend-Line.ps1

## Will take a string and prepend each line of a file and output to a different file.
## eg
## Given a file containing 3 lines called infile.txt:
## line 1
## line 2
## line 3

## using the command "Prepend-Line.ps1 -infile infile.txt -prepend asdf -outfile outfile.txt
## will create a file called outfile.txt containing:
## asdfline 1
## asdfline 2
## asdfline 3

## Usage:
## Prepend-Line.ps1 -infile %PATHTOFILETOREAD% -prepend %STRINGTOPREPEND% -outfile %PATHTOFILETOWRITE%
## -infile is the file to read
## -prepend is the string data to add to the front of each line
## -outfile is the file to write - if the file exists it will be overwritten

## eg:
## Prepend-Line.ps1 -infile c:\logs\monday.txt -prepend "Monday 18/01/2016" -outfile c:\logs\modmonday.txt


param(
    [string]$infile=$(throw "-infile parameter is required"),
    [string]$prepend=$(throw "-prepend parameter is required"),
    [string]$outfile=$(throw "-outfile parameter is required")
)

$newfile=$null
$wholefile=get-content $infile

foreach($line in $wholefile)
{
    $newline=$Prepend+$line
    $newfile=$newfile+$newline+"`n"
}

$newfile | out-file $outfile