Problem with Invoke-Expression

Question

Hi, I need some help with a simple command that should work and it don't.
I do not know how exactly search for an answer but here is what I am trying to achieve:
I need to see if bitlocker is enabled on some computers (windows 7 so no get-bitlockervolume), to make this happen I am using that piece of code I got from some search on Bing:
In a ps1 file using Powershell ISE
$Result = Invoke-Expression "Manage-BDE -Status C:"
If ($Result.Contains("Activate"))
{Out-File "C:\BitlockerYes.txt"}
Else
{Out-File "C:\BitlockerNo.txt}
The problem is that the query seem empty or at least there is the BitlockerNo.txt file is always created.
I then tried to run the command using only Powershell and type:
$Result = Invoke-Expression "1..3"
Then type:
$result.Contains("2")
I get False as a result but when typing:
$Result
It shows:
1
2
3
Anyone can explain this to me? I tried on Windows 8.1.

Answer 1

PS C:\scripts> manage-bde -status >bde.txt
PS C:\scripts> cat bde.txt
BitLocker Drive Encryption: Configuration Tool version 6.3.9600
Copyright (C) 2013 Microsoft Corporation. All rights reserved.
Disk volumes that can be protected with
BitLocker Drive Encryption:
Volume C: [ACER]
[OS Volume]
    Size:                 451.91 GB
    BitLocker Version:    None
    Conversion Status:    Fully Decrypted
    Percentage Encrypted: 0.0%
    Encryption Method:    None
    Protection Status:    Protection Off
    Lock Status:          Unlocked
    Identification Field: None
    Key Protectors:       None Found
PS C:\scripts>
¯\_(ツ)_/¯