title: What's the difference between ToString("D2") .ToString("00")
body: <p>I just noticed some of my code uses:</p>
  
  <pre><code>ToString("D2")
  </code></pre>
  
  <p>and other uses: </p>
  
  <pre><code>.ToString("00")
  </code></pre>
  
  <p>Both are being used to convert numbers from 0 to 99 into strings from 00 to 99. That is strings where the numbers 0-9 have a leading zero. </p>
  
  <p>Do both of these methods do the same thing?</p>