title: asp.net parameter is not valid when using bitmap
body: <pre><code>private void LoadButtonImage()
  {
      if(buttonPicture != null)
          buttonPicture.Dispose();
  
      string templateFileName = "PicTemplate/RoundedRectangle.png";
      buttonPicture = new Bitmap(templateFileName);
  }
  </code></pre>
  
  <p>This is my coding ..... parameter is not valid in runtime ... what can I do?</p>