Saving a DataTable encrypted to a file

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C#

XML

encryption

DataTable

Hello everybody,

I have a problem with my C# code and as alwlays the internet was no help so far... I've tried about 30 solution, but they just had no funciont or were only good for strings and so on.

I just want to save my DataTable in a file so that nobody can read it. Serialization is too unsafe and it doesn't work either btw. This is the deciding code:

private DataTable machineTable = new DataTable();
private Rijndael crypto = Rijndael.Create();
private FileStream stream;
...
this.crypto.IV = ASCIIEncoding.ASCII.GetBytes(IV);
this.crypto.Key = ASCIIEncoding.ASCII.GetBytes(password);

this.stream = new FileStream(Global.MachineParametersDataFile, FileMode.OpenOrCreate, FileAccess.Write);
CryptoStream cryptoStream = new CryptoStream(this.stream, crypto.CreateEncryptor(this.crypto.Key, this.crypto.IV), CryptoStreamMode.Write);
this.machineTable.WriteXml(stream, XmlWriteMode.WriteSchema, true);

password: 32byte
IV: 16byte

Actually this code produces a couple of binary lines, but the whole rest is completely
Does anybody know why that does not work and maybe have a working solution???