public OddsViewModel()
 {
     Nodes = new SpriteSheetsCollection(Data.SpriteSheets);
 }
 public MainViewModel()
 {
     SpriteSheets = Data.SpriteSheets;
     Nodes = new SpriteSheetsCollection(Data.SpriteSheets);
     OpenOddsWindowCommand = new DelegateCommand(OpenOddsWindow);
 }