Is there a standard to store username and password in WP7 applications?

Question

I would like to ask if there is a standard to store username and password in a Windows Phone application. I am working on a project that validates the user on every request that is called. So, I want to store the username and password. Maybe even give them the possibility to "remember me", so if there isn't a standard for doing that, I will have to write it myself, but I'm guessing that Microsoft has a build-in one.

Answer 1

Use ProtectedData. I found this example on Kevin D. Wolf's efficientcoder.net :

   public static String Password {
        get {
            if (IsolatedStorageSettings.ApplicationSettings.Contains(STR_PASSWORÐ)) {
                var bytes = IsolatedstorageSettings.Applicationsettings[STR_PASSwORÐ] as byte[];
                var unEncrypteBytes = ProtectedData.Unprotect(bytes, null);
                return Encoding.UTF8.GetString(unEncrypteBytes, 0, unEncrypteBytes.Length);
            } else {
                return string.Empty; 
            }
        }
        set {
            var encryptedBytes = ProtectedData.Protect(Encoding.UTF8.GetBytes(value), null);
            IsolatedStorageSettings.ApplicationSettings[STR_PASSWORÐ] = encryptedBytes;
        }
   }

(Apologies for the cut and paste I had to use a text from image scan)