Encrypt Decrypt DataSets in .NET

I need functions that can encrypt and decrypt datasets. Currently I am reading/writing my datasets with ReadXML and writeXML. I would like to write out encrypted datasets and then be able to read in the encrypted datsets and de-crypt them. I would rather not write out un-encrypted datasets and then encrypt the files. I would like whatever file is written, to be written already encrypted. So I need functions that I can pass a dataset, filename and a private key to: i.e. ---------------- ' Encrypt Dataset ' The arguments are ' 1. The Dataset to encrypt ' 2. The filename to create ' 3. The private encryption key encryptedstring = EncryptDataset(ds, filename, "privatekey") ---------------- 'Decrypts dataset ' The arguments are ' 1. The filename to read ' 2. The private encryption key dim ds as new dataset ds = DecryptDataset(filename,"privatekey") ================================================= My .NET application is written in VB.Net so I would prefer the function in VB. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Complete ownership and distribution copyrights to all work purchased. ## Platform Windows