title: How can i compare a string with 3 other strings?
body: <p>I'm a beginner in c#, and I want to test if a String is not equal to one string OR another string OR another.
  I tried the logic operator or ||, but it doesn't seem to work.</p>
  
  <p>The test is always true, even if I enter a correct string
  Any suggestions would be gladly appreciated.</p>
  
  <p><strong>Here's is the code</strong></p>
  
  <pre><code>if (!difficulty.Equals("Beginner") || !difficulty.Equals("Amateur") || !difficulty.Equals("Expert"))
  {
      // do something
  }
  </code></pre>