private void UpdatePreview_Click(object sender, EventArgs e) { imagePacker.Reset(); imagePacker.SetSize(Int32.Parse(Sizes.SelectedItem.ToString())); imagePacker.SetPadding(currentPaddingText != null ? Int32.Parse(currentPaddingText) : 0); if (FileListVM.Files.Count > 0) { FileListVM.Files.ToList().ForEach(x => { imagePacker.AddImagePath(x.FilePath); }); imagePacker.PreviewOutput(PreviewImage); } }