title: List of strings to string
body: <p>I have a list of strings:</p>
  
  <pre><code>List&lt;string[]&gt; myList
  </code></pre>
  
  <p>I want to convert it to a string separated by ",".
  I know how to convert List myList but not what i need..
  I tried</p>
  
  <pre><code>String.Join(", ", myList.ToArray());
  </code></pre>
  
  <p>But i won't work for string[]</p>
  
  <p>I tried to search the internet for solutions but could not found one...
  I know i can do it with foreach but im looking for one line solution, mostly to learn more advanced coding.</p>
  
  <p>Thank you!</p>