title: regex to split numbers and operators
body: <p>How do I split below string to list of string with numbers and operators separated (string does not contain parenthesis or negative numbers).</p>
  
  <p>Example: </p>
  
  <pre><code>inputString  =  1+2-2.3*4/12.12
  outputList =   {1,+,2,-,2.3,*,4,/,12.12}
  </code></pre>
  
  <p>Below will give me numbers only. I need operators as well</p>
  
  <pre><code>var digits = Regex.Split(inputString  , @"\D+");
  </code></pre>