Get-BitlockerVolume

$Title = ""
$Message = "What do you want to do?"
$Decrypt = New-Object System.Management.Automation.Host.ChoiceDescription "&Decrypt", "Decrypt"
$Encrypt = New-Object System.Management.Automation.Host.ChoiceDescription "&Encrypt", "Encrypt"
$Exit = New-Object System.Management.Automation.Host.ChoiceDescription "&Exit", "Exit"
$Options = [System.Management.Automation.Host.ChoiceDescription[]]($Decrypt, $Encrypt, $Exit)
 do {
    $Action = $host.ui.PromptForChoice($title, $message, $options, 0) 
    switch($Action)
    {
        0 {$Drive = Read-Host -Prompt 'Which drive do you want to decrypt?'; Unlock-BitLocker -MountPoint $Drive":" -Password (Read-Host "Enter your password:" -AsSecureString)}
        1 {$Drive = Read-Host -Prompt 'Which drive do you want to encrypt?'; Lock-BitLocker -MountPoint $Drive":"}
        2 {Write-Host "Exiting script";Start-Sleep -Seconds 3}
    }
} While ($Action -ne 2)