Convert secure string to plain text

ConvertSecureToString.ps1

function ConvertSecureToString
{
    [CmdletBinding()]
    [OutputType([String])]
    param (
        [Parameter(Mandatory=$true, 
                   ValueFromPipeline=$true,
                   Position=0)]
        [ValidateNotNull()] 
        [SecureString]
        $SecureString
    )

    Process 
    {
        try {
            $binaryString = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($SecureString)
            [System.Runtime.InteropServices.Marshal]::PtrToStringAuto($binaryString)
        } catch {
            Throw "Could not convert secure string to plain text: $($_.Exception.Message)"
        }
    }
}