title: easy and fast way to convert an int to binary?
body: <p>What I am looking for is something like PHPs <code>decbin</code> function in C#. That function converts decimals to its representation as a string.</p>
  
  <p>For example, when using <code>decbin(21)</code> it returns <code>10101</code> as result.</p>
  
  <p>I found <a href="http://www.globalguideline.com/articles/analysis.php?k=Converting_Between_Binary_and_Decimal_in_C_sharp" rel="noreferrer">this function</a> which basically does what I want, but maybe there is a better / faster way?</p>