title: How can I check if a string is null or empty in PowerShell?
body: <p>Is there a built-in <code>IsNullOrEmpty</code>-like function in order to check if a string is null or empty, in PowerShell?</p>
  
  <p>I could not find it so far and if there is a built-in way, I do not want to write a function for this.</p>