public override string ToString()
 {
     return(Park_ID.ToString() + Name + Location + Establish_date.ToString() + Area.ToString() + Visitors.ToString() + Description);
 }
 public override string ToString()
 {
     return(Campground_ID.ToString() + Park_ID.ToString() + Name + Open_From_MM.ToString() + Open_To_MM.ToString() + Daily_Fee.ToString());
 }