title: How to display message box without any buttons in C#
body: <p>I try to show a MESSAGE to the user while an operation is executed. The MESSAGE won't show any button. Just a MESSAGE (text) and maybe a background image.</p>
  
  <p>The problem is the following: </p>
  
  <ul>
  <li>MessageBox does not seem to be the good control (because of button and it blocks the running process).</li>
  <li>Form.ShowDialog() also blocks the running process. I don't know what to do.</li>
  <li>I want to show the message, run my process, and dispose the message when the process is done.</li>
  </ul>
  
  <p>How to achieve this in <code>C#</code> ?</p>