title: Compare multiple strings in C#
body: <p>I would like to be able to compare multiple strings with each other and return <code>true</code> if they are all equal. If any of the strings equal "N/A" then they are to be ignored in the comparison. For example:</p>
  
  <pre><code>string1 = "hi";
  string2 = "hi";
  string3 = "hi";
  string4 = "N/A";
  </code></pre>
  
  <p>would return <code>true</code>, but:</p>
  
  <pre><code>string1 = "hi";
  string2 = "hey";
  string3 = "hi";
  string4 = "hi";
  </code></pre>
  
  <p>would return <code>false</code>.</p>
  
  <p>Thanks for your help.</p>