Stack Overflow Error?

[jetter2]

I am writing a program to act as a postage calculator. I am getting a stack overflow error and I can't for the life of me figure out WHY it is happening. Can one of you gents point me in the right direction??

namespace Lab2
{
    public class Package
    {
        private string FName;
        private string LName;
        private string Address;
        private string City;
        private string State;
        private string ZipCode;
        private decimal Weight = 0.0M;// in ounces
        private decimal Cost = 0.00M;// per ounce

        // constructor
        public Package(string FirstName1, string LastName1, string Address1, string City1, string State1,
            string ZipCode1, decimal Weight1, decimal Cost1)
        {
            // implicit call to object constructor
            FName = FirstName1;
            LName = LastName1;
            Address = Address1;
            City = City1;
            State = State1;
            ZipCode = ZipCode1;
        }// end Package constructor

        // read-only property that gets first name
        public string FirstName1
        {
            get
            {
                return FName;
            }// end get
        }// end property FirstName1

        // read-only property that gets last name
        public string LastName1
        {
            get
            {
                return LName;
            }// end get
        }// end property LastName1

        // read-only property that gets address
        public string Address1
        {
            get
            {
                return Address;
            }// end get
        }// end property Address11

        // read-only property that gets city
        public string City1
        {
            get
            {
                return City;
            }//end get
        }// end property City1

        // read-only property that gets state
        public string State1
        {
            get
            {
                return State1;
            }//end get
        }// end property State1

        // read-only property that gets zip
        public string ZipCode1
        {
            get
            {
                return ZipCode;
            }// end get
        }// end property ZipCode1

        // read-only property that gets weight
        public decimal Weight1
        {
            get
            {
                return Weight;
            }// end get
            set
            {
                Weight = (value < 0) ? 0 : value;
            }// end set
        }// end property Weight1

        // read-only property that gets cost
        public decimal Cost1
        {
            get
            {
                return Cost;
            }//end get Cost1
            set
            {
                Cost = (value < 0) ? 0 : value;
            }// end set
        }// end property Cost1

        // Calculate cost
        public virtual decimal CalculateCost()
        {
            return Weight1 * Cost1;
        }// end method CalculateCost

        // return string representation of Package object
        public override string ToString()
        {
            return string.Format(
                "{0}: {1} {2}: \n{3}: {4}\n{5}: {6} \n{7}: {8}\n{9}: {10}: \n{11}: {12} \n{13:F2}: {14} \n{15:C}: {16}",
                "Sender's First Name", FirstName1, 
                "Sender's LastName1", LastName1,
                "Address", Address1,
                "City", City1,
                "State", State1, 
                "ZipCode",ZipCode1,
                "Weight", Weight1,
                "Cost", Cost1);
        }// end ToString method

    }// end class Package
}// end namespace Lab2

 

namespace Lab2
{
    public class TwoDayPackage : Package
    {
        private decimal Fee = 5.00M;// 2-day flat fee delivery charge

        //derived class constructor
        public TwoDayPackage(string FirstName1, string LastName1, string Address1, string City1,
            string State1, string ZipCode1, decimal Weight1, decimal Cost1)
            : base(FirstName1, LastName1, Address1, City1, State1, ZipCode1, Weight1, Cost1)
        {
            Fee1 = Cost1;
        }// end constructor

        // property that gets and sets
        public decimal Fee1
        {
            get
            {
                return Fee;
            }// end get
            set
            {
                Fee = (value < 0) ? 0 : value;
            }// end set
        }// end property Fee1

        // calculate total cost
        public override decimal CalculateCost()
        {
            return Fee1 + base.CalculateCost();
        }// end method CalculateCost

        // return string representation of TwoDayPackage
        public override string ToString()
        {
            return string.Format("Fee {0}\nFee: {1:C}",
                base.ToString(), Fee1);
        }// end method ToString
    }// end class TwoDayPackage
}// end namespace Lab2

 

namespace Lab2
{
    public class OverNightPackage : Package
    {
        private decimal AddFee = 10.00M;// additional fee per ounce for overnight delivery

        // derived class constructor
        public OverNightPackage(string FirstName1, string LastName1, string Address1, string City1, string State1,
            string ZipCode1, decimal Weight1, decimal Cost1)
            : base(FirstName1, LastName1, Address1, City1, State1, ZipCode1, Weight1, Cost1)
        {
            AddFee1 = Cost1;
        }// end constructor

        // property for AddFee1
        public decimal AddFee1
        {
            get
            {
                return AddFee;
            }// end get
            set
            {
                AddFee = (value < 0) ? 0 : value;
            }// end set
        }// end property AddFee1

        // calculate cost
        public override decimal CalculateCost()
        {
            return AddFee1 + base.CalculateCost();
        }// end method CalculateCost

        // return string representation of OverNightPackage
        public override string ToString()
        {
            return string.Format("Cost {0}\nAdditional Fee: {1:C}",
                base.ToString(), AddFee1);
        }// end method ToString
    }// end class OverNightPackage
}// end namespace Lab2

 

namespace Lab2
{
    public class PackageTest
    {
        public static void Main(string[] args)
        {
            // instantiate Package object
            Package Sender = new Package("Jane", "Doe", "121 Broad St", "Houston", "Texas", "77077",
                5.0M, 10.00M);
            Sender.CalculateCost();
            Console.WriteLine(Sender.ToString());

            // instantiate TwoDayPackage object
            TwoDayPackage TwoDayPkg = new TwoDayPackage("John", "Doe", "1201 Main St",
                "Dallas", "Texas", "75208", 7.5M, 13.00M);

            // instantiate OverNightPackage object
            OverNightPackage OverNightPkg = new OverNightPackage("Mary", "Bloom", "540 River Lane",
                "Dallas", "Texas", "75055", 3.0M, 7.50M);

            // display Sender data
            Console.WriteLine("First name is: {0}", Sender.FirstName1);
            Console.WriteLine("Last name is: {0}", Sender.LastName1);
            Console.WriteLine("Address is: {0}", Sender.Address1);
            Console.WriteLine("City: {0}", Sender.City1);
            Console.WriteLine("State: {0}", Sender.State1);
            Console.WriteLine("Zip: {0}", Sender.ZipCode1);
            Console.WriteLine("Weight of package: {0:F2}", Sender.Weight1);
            Console.WriteLine("Cost of package: {0:C}", Sender.Cost1);
           
            Console.WriteLine(TwoDayPkg.ToString());
            Console.WriteLine(OverNightPkg.ToString());
            
        }
    }
}