private void LoadThumbnailsFileButton_Click(object sender, RoutedEventArgs e) { OpenFileDialog openFileDialog = new OpenFileDialog(); if (openFileDialog.ShowDialog() == true) { try { LoadedThumbnailsFileTextBox.Text = "Loading..."; bitmapReader = new BitmapReader.BitmapReader(openFileDialog.FileName); LoadedThumbnailsFileTextBox.Text = openFileDialog.FileName; } catch { MessageBox.Show("Unable to load thumbnails file!"); bitmapReader = null; LoadedThumbnailsFileTextBox.Text = ""; } } ShowCluster(0); }