Encode / Decode .EXE into Base64

The problem was caused by:

1. Get-Content without -raw splits the file into an array of lines thus destroying the code
2. Text.Encoding interprets the binary code as text thus destroying the code
3. Out-File is for text data, not binary code

The correct approach is to use IO.File ReadAllBytes:

$base64string = [Convert]::ToBase64String([IO.File]::ReadAllBytes($FileName))

and WriteAllBytes to decode:

[IO.File]::WriteAllBytes($FileName, [Convert]::FromBase64String($base64string))