$orig = 'C:\Users\tonycao\work\twincat3-auto-cli\TwinCAT_EL6695_Secondary\TwinCAT_EL6695_Secondary.tsproj'
$bak = 'C:\Users\tonycao\work\twincat3-auto-cli\TwinCAT_EL6695_Secondary\TwinCAT_EL6695_Secondary.tsproj.bak'
$origHash = Get-FileHash -Path $orig -Algorithm SHA256
$bakHash = Get-FileHash -Path $bak -Algorithm SHA256
Write-Host "tsproj SHA: $($origHash.Hash)"
Write-Host "bak    SHA: $($bakHash.Hash)"
Write-Host "Different: $($origHash.Hash -ne $bakHash.Hash)"