C#

var Interval_50ms = Observable.Interval(TimeSpan.FromMilliseconds(50))
    .Take(10);

var Interval_100ms = Observable.Interval(TimeSpan.FromMilliseconds(100))
    .Take(5)
    .Select(i => Convert.ToChar(i + 65).ToString().ToUpper());

var Result = Observable.Join(
    Interval_50ms,
    Interval_100ms,
    s => Observable.Never<Unit>(),
    c => Observable.Empty<Unit>(),
    (s, c) => { return s.ToString() + ", " + c.ToString(); })
    .Subscribe(Console.WriteLine);

Observable.Join(
                Interval_50ms,
                Interval_100ms,
                s => Interval_50ms,
                c => Observable.Empty<char>(),
                (s, c) => { return s.ToString() + ", " + c.ToString(); })
                .Subscribe(Console.WriteLine);

1. Pick a hashing function. (salted SHA256/512 is a fair pick right now)
2. When a user sets a password, derive the hash and store that in the database.
3. When a user authenticates, hash the password that they enter using the same function, and compare it to the database entry.

Richard MacCutchan wrote:

No, he needs to forget about encryption and concentrate on doing the right thing the right way.

using (var context = new BlogContext()) 
{ 
    context.Database.Log = Console.Write; 
 
    // Your code here... 
}