New Post: How do I update a preview window from imagemagick?

I am writing a program that takes a string from a textedit box, does imagemagick voodoo on it, but when it generates it, it saves the file as foo.png and a preview panel control loads foo.png. it works fine. however, if i stay in the program, change the text, and regenerate i get an unhandled exception that gets cross with me saying the file access is denied. the file itself still gets updated, it is just the panel control.

how do i fix it?

try
                {
                    using (MagickImage result = images.Montage(montageSettings))
                    {
                        result.Write("foo.png");                        
                    }
                }

                catch (Exception ex)
                {
                    string message = "Exception type " + ex.GetType() + Environment.NewLine + 
                        "Exception message: " + ex.Message + Environment.NewLine  + 
                        "Stack trace: " + ex.StackTrace + Environment.NewLine;

                    if (ex.InnerException != null)
                    {
                        message += "---BEGIN InnerException--- " + Environment.NewLine +
                                   "Exception type " + ex.InnerException.GetType() + Environment.NewLine +
                                   "Exception message: " + ex.InnerException.Message + Environment.NewLine +
                                   "Stack trace: " + ex.InnerException.StackTrace + Environment.NewLine +
                                   "---END Inner Exception";
                    }

                    Console.WriteLine(message);
                }                
            }

            // problems start here mate
            // as if this gets commented out, it wont crash, but previewing is a necessity.
            Preview.BackgroundImage = Image.FromFile("foo.png");                          

            // End of problematic area