Combine two guids

combineGuids.ps1

function combineIds() {

    param(
        [Parameter()]
        [Guid]$First,

        [Parameter()]
        [Guid]$Second
    ) 

    process {

        $firstAsArray  = $First.ToByteArray()
        $secondAsArray = $Second.ToByteArray()
  
        for($index = $firstAsArray.Count - 1; $index -ge 0; $index--) {

            $byteFirst  = $firstAsArray.GetValue($index)
            $byteSecond = $secondAsArray.GetValue($index)

            $firstAsArray[$index] = $byteFirst -bxor $byteSecond
        }

        [Guid]$firstAsArray
    }
}