I am trying to do something very simple in powershell

1. Reading the contents of a file
2. Manipulation some string

3. Saving the modified test back to the file

   function Replace { $file = Get-Content C:\Path\File.cs $file | foreach {$_ -replace "document.getElementById", "$"} |out-file -filepath C:\Path\File.cs }

I have tried Set-Content as well.

I always get unautorized exception. I can see the $file has the file content, error is coming while writing the file.

Any help is appreciated.

Ben