title: Converting string or char to int
body: <p>I'm totally puzzled</p>
  
  <pre><code>string temp = "73";
  int tempc0 = Convert.ToInt32(temp[0]);
  int tempc1 = Convert.ToInt32(temp[1]);
  MessageBox.Show(tempc0 + "*" + tempc1 + "=" + tempc0*tempc1);
  </code></pre>
  
  <p>I would expect: <code>7*3=21</code></p>
  
  <p>But then I receive: <code>55*51=2805</code></p>