Encrypted Storage

I don’t want to hard code user names and passwords how I ve done, How I can put this in Encrypted Storage??? in Asp.net code...

Xdocument xdoc= new Xdoc('..........")                   

new XAttribute("username", "11qwErt=11"),

                 new XAttribute("password", "aa2v1u5u323WS-q"),

XElement('........")));