title: .net regex specifing number of digits in a string
body: <p>hello i am trying to find a match in the followig format in a text file using regex and save the number into a variable.</p>
  
  <pre><code>id='12341234321234131313'
  </code></pre>
  
  <p>now my problem i want to consider the string a match only if the integer has a number digits between 16 and 22, is it possible to do this directly using regex or do i have to check for the length?</p>
  
  <p>i would use the following if to match when the number of digits is 20</p>
  
  <pre><code>Dim rex = New Regex("id='(\d{20})'")
  </code></pre>
  
  <p>but what about between 2 numbers?</p>