public HexCoordinate Minus(HexCoordinate otherCoor)
 {
     return(new HexCoordinate(X - otherCoor.X, Y - otherCoor.Y));
 }
 public HexCoordinate Plus(HexCoordinate otherCoor)
 {
     return(new HexCoordinate(X + otherCoor.X, Y + otherCoor.Y));
 }