title: Show message box in case of exception
body: <p>I'm wondering what the correct way is to pass on an exception from one method to my form.</p>
  
  <pre><code>public void test()
  {
      try
      {
          int num = int.Parse("gagw");
      }
      catch (Exception)
      {
          throw;
      }
  }
  </code></pre>
  
  <p>Form:</p>
  
  <pre><code>try
  {
      test();
  }
  catch (Exception ex)
  {
      MessageBox.Show(ex.Message);
  }
  </code></pre>
  
  <p>in this way i cannot see my text box.</p>