Can you save more than 1 array into a file?

Is there?

 BinaryFormatter bf = new BinaryFormatter();   
 FileStream fs = new FileStream(Application.dataPath+"/Saves/arrays.dat", FileMode.Open);   
 array = (int[])bf.Deserialize(fs);

Thats for the loading, and saving :

 BinaryFormatter bf = new BinaryFormatter();   
 FileStream fs = new FileStream(Application.dataPath+"/Saves/arrays.dat", FileMode.Create, FileAccess.ReadWrite);   
 bf.Serialize(fs, array);

Any help is awesome!