How to password generate XML file using asp.net c#

It is not possible to password protect a file, you can encrypt the file using some key and then only using that key anyone can decrypt and read it

look at this link


http://aspsnippets.com/Articles/Encrypt-and-Decrypt-Word-Excel-PDF-Text-or-Image-Files-using-C-and-VBNet-in-ASPNet.aspx