title: C# Array, How to make data in an array distinct from each other?
body: <p>C# Array, How to make data in an array distinct from each other?
  For example </p>
  
  <pre><code>string[] a = {"a","b","a","c","b","b","c","a"}; 
  </code></pre>
  
  <p>how to get </p>
  
  <pre><code>string[]b = {"a","b","c"}
  </code></pre>