DataTableCryptography

<#
"System.Security.Cryptography.RijndaelManaged"
"System.Security.Cryptography.AesManaged"
#>
class SaveDataToXml
{
    [System.Data.DataTable]  $dataTable
    [byte[]] $bKey
    [byte[]] $bIV
    [System.Security.Cryptography.ICryptoTransform] $encryptor 
    [System.Security.Cryptography.ICryptoTransform] $decryptor 

    SaveDataToXml()
    {
    }

    SaveDataToXml([string] $strKey,[string] $strIV,[string] $CryptographyProviderName)
    {
    	[System.Text.UnicodeEncoding] $unicodeText = [System.Text.UnicodeEncoding]::new()
	    [byte[]] $this.bKey = $unicodeText.GetBytes($strKey)
        [byte[]] $this.bIV = $unicodeText.GetBytes($strIV)

        $CryptographyProvider = New-Object -TypeName $CryptographyProviderName
        $this.encryptor  = $CryptographyProvider.CreateEncryptor($this.bKey, $this.bIV)
        $this.decryptor  = $CryptographyProvider.CreateDecryptor($this.bKey, $this.bIV)
    }
    CreateTable([string] $tableName)
    {
        [System.Data.DataTable]  $this.dataTable = [System.Data.DataTable]::new($tableName)
        $this.dataTable.Columns.Add("UserName")
        $this.dataTable.Rows.Add("User1")
        $this.dataTable.Rows.Add("User2")
    }

    EncryptFile([string] $FilePath)
    {

        [System.IO.FileStream] $fs = [System.IO.File]::OpenWrite($FilePath)
	    [System.Security.Cryptography.CryptoStream] $strm = [System.Security.Cryptography.CryptoStream]::New($fs, $this.encryptor, [System.Security.Cryptography.CryptoStreamMode]::Write)
        $this.dataTable.WriteXml($strm)
	    $strm.Close()
        $fs.Close()
    }

    [System.Data.DataSet] DecryptFile([string] $FilePath)
    {
	    [System.Data.DataSet] $DataSet = [System.Data.DataSet]::New()
        [System.IO.FileStream] $fs = [System.IO.File]::OpenRead($FilePath)
	    [System.Security.Cryptography.CryptoStream] $strm = [System.Security.Cryptography.CryptoStream]::new($fs, $this.decryptor, [System.Security.Cryptography.CryptoStreamMode]::Read)
	    $DataSet.ReadXml($strm)
        $strm.Close()
	    $fs.Close()
	    return  $DataSet
    }
}
$FilePath = "C:\Temp\Users.txt"
[SaveDataToXml] $dtToXml = [SaveDataToXml]::new("12345678","87654321","System.Security.Cryptography.AesManaged")
$dtToXml.CreateTable("Users")
$dtToXml.EncryptFile($FilePath)
$dt1 = $dtToXml.DecryptFile($FilePath)
$dt1.Tables["Users"]