title: Exception while converting String to integer in C#
body: <p><br/>
  I get error: Format exception was unhandled, Input string was not in a correct format.<br/>
  for this line:<br/></p>
  
  <pre><code>int right = System.Convert.ToInt32(rightAngleTB.Text);
  </code></pre>
  
  <p>rightAngleTB is TextBox, the value Text is "25" (without the "").<br/></p>
  
  <p>I really don´t see the problem :(<br/></p>