Help Creating a class, ToString override, methods

[techlawsam]

Hello all, im doing this problem which will allow a store to return a invoice, I have two classes and I guess I am at the very end and need help fixing some things so I can finally have the program execute:

Class1: "Invoice":

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace InvoiceApp
{
    class Invoice
    {
        private string invNumber;
        private string invDescription;
        private int invPrice;
        private int invPurchased;
        private double invTotalCost;

        public Invoice()
        {
           
        }

        public Invoice(string number)
        {
            invNumber = number;
        }

        public Invoice(string number, string description)
        {
            invNumber = number;
            invDescription = description;
        }

        public Invoice(string number, string description, 
                        int price, int purchased)
        {
            invNumber = number;
            invDescription = description;
            invPrice = price;
            invPurchased = purchased;
        }

        public string InvNumber
        {
            get
            {
                return invNumber;
            }
            set
            {
                invNumber = value;
            }
        }

        public string InvDescription
        {
            get
            {
                return invDescription;
            }
            set
            {
                invDescription = value;
            }
        }

        public int InvPrice
        {
            get
            {
                return invPrice;
            }
            set
            {
                invPrice = value;
            }
        }

        public int InvPurchased
        {
            get
            {
                return invPurchased;
            }
            set
            {
                invPurchased = value;
            }
        }

        public double InvTotalCost
        {
            get
            {
                return invPurchased * invPrice;
 
            }
            set
            {
                invTotalCost = value;
 
            }
        }


        public override string ToString()
        {
            return "Item Description: " + invDescription.ToString(); +
                   "\nTotal Cost: " + invTotalCost.ToString("C");
                  
        }

    } //class ends 
} //namespace ends

Class2: "InvoiceApp" :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace InvoiceApp
{
    class InvoiceApp
    {
        static void Main(string[] args)
        {
            Invoice someQuantity = new 
           
            
            someQuantity.InvPurchased = someQuantity.InvPurchased * ;

            Console.Write(someQuantity);
            Console.Write(someDescription);
            Console.ReadKey();
        } //Main Ends 
    } //class ends 
} //namespace ends

Line 104-109 Im trying to get to the point where I return what the Item Description and total cost in "Class1, Invoice"

Lines 12-22 in Class2: "InvoiceApp" Im trying to use constructors and objects to help me print to the output screen

Thank you very much again all of you!

[techlawsam]

bump

[Mitja Bonca]

Do it this way:

class Program
    {
        static void Main(string[] args)
        {
            Invoice someQuantity = new Invoice("1", "some description", 100, 120);
            Console.Write(someQuantity);
            Console.ReadKey();
        }
    }

    class Invoice
    {
        public Invoice()
        {

        }

        public Invoice(string number)
        {
            this.InvNumber = number;
        }

        public Invoice(string number, string description)
        {
            this.InvNumber = number;
            this.InvDescription = description;
        }

        public Invoice(string number, string description,
                        int price, int purchased)
        {
            this.InvNumber = number;
            this.InvDescription = description;
            this.InvPrice = price;
            this.InvPurchased = purchased;
        }

        public string InvNumber { get; set; }
        public string InvDescription{ get; set; }       
        public int InvPrice{ get; set; }       
        public int InvPurchased{ get; set; }
        public double InvTotalCost
        {
            get { return InvPurchased * InvPrice; }
        }

        public override string ToString()
        {
            return String.Format("Item Description: {0}\nTotal Cost: {1} ", InvDescription, InvTotalCost.ToString("C"));
        }
    }