title: Remove-Variable - Cannot find a variable with the name
body: <p>I have a powershell script that with the following <code>hashtable</code></p>
  
  <pre><code>[HashTable]$folder_and_prefix = @{}
  </code></pre>
  
  <p>After a certain point in my script I no longer need that <code>hashtable</code>, I tried doing:</p>
  
  <p><code>Remove-Variable $folder_and_prefix</code></p>
  
  <p>but I get the following error:</p>
  
  <blockquote>
    <p>Remove-Variable : Cannot find a variable with the name
    'System.Collections.Hashtable'</p>
  </blockquote>
  
  <p>Is it possible to remove a hastable that I no longer need?</p>