private void AddPictureFileHandler()
        {
            var dialog = new OpenFileDialog
            {
                Filter      = "Bitmap (*.bmp)|*.bmp",
                Multiselect = false
            };

            var result = dialog.ShowDialog();

            if (result == DialogResult.OK)
            {
                if (dialog.FileNames.Any())
                {
                    var targetBitmap = new TargetBitmapInfo(dialog.FileName);
                    targetBitmap.Init();

                    BitmapInfos.Add(targetBitmap);
                }
            }
        }