title: How to compare standard DayOfWeek to own with Flag
body: <p>I have my own DaysOfWeek Flag enum (kind of <a href="https://docs.microsoft.com/en-us/previous-versions/ms886541(v=msdn.10)" rel="nofollow noreferrer">https://docs.microsoft.com/en-us/previous-versions/ms886541(v=msdn.10)</a>)</p>
  
  <pre><code>[Flags]
  public enum DayOfWeek
  {
      Sunday = 0,
      Monday = 1,
      Tuesday = 2,
      Wednesday = 4,
      Thursday = 8,
      Friday = 16,
      Saturday = 32
  }
  </code></pre>
  
  <p>And I need to compare standard DayOfWeek with mine. How can I do that?</p>