How do I Cast When Deserializing A List

[Uta P]

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
 
 
namespace SD2coursework
{
    public partial class FrmHireCo : Form
    /*
     * This is the main form for the car hire system.
     * It allows the adding to new cars to the system, and displaying them in the fleet list
     * 
     */
    {
        public Fleet myFleet = new Fleet();
 
 
 
 
        private CustomerList NewCustomer = new CustomerList();
        //Fleet object used to store cars
 
 
        public FrmHireCo()
        {
            //Default constructor
            InitializeComponent();
 
            Stream stream = new FileStream(@"MyApplicationData.dat", System.IO.FileMode.Open);
            IFormatter formatter = new BinaryFormatter();
            Fleet myFleet = (Fleet)formatter.Deserialize(stream););
            stream.Close();
        }
 
 
        private void updateFleetList()
        {   //Used to update the fleet displayed on the form
            lstFleet.Items.Clear();
            foreach (Transport t in myFleet.fleet)
            {
                if (t is Car)
                {
                    Car m = (Car)t;
                    lstFleet.Items.Add("Car: " + m.reg + " " + m.make + " " + m.model + " " + m.colour + "\t " + m.hirer);
                }
                else
                    if (t is Mini)
                    {
                        Mini m = (Mini)t;
                        lstFleet.Items.Add("Minibus: " + m.reg + " " + m.make + " " + m.model + " " + m.colour + "" + m.seat + "\t " + m.hirer);
                    }
                    else
                        if (t is Truck)
                        {
                            Truck m = (Truck)t;
                            lstFleet.Items.Add("Truck: " + m.reg + " " + m.make + " " + m.model + " " + m.colour + " " + m.weight + "\t " + m.hirer);
                        }
            }
        }
 
        private void updatecustomerlist()
        {
            lstCustomers.Items.Clear();
            foreach (Customer c in NewCustomer.customerlist)
            {
                lstCustomers.Items.Add("Customer ID :" + c.custid + " Customers Name:" + c.name + " Address:" + c.address);
            }
 
        }
 
 
 
 
        private void btnAddCar_Click(object sender, EventArgs e)
        {
            //Add a new car
            FrmCar carGui = new FrmCar(); //Form used to add new car
            carGui.ShowDialog();
            Car myCar = carGui.car;         //Get new car from form
            myFleet.addToFleet(myCar);      //Add to fleet list
            updateFleetList();              //Uodate fleet list
        }
 
        private void lstFleet_SelectedIndexChanged(object sender, EventArgs e)
        {
            /*
             * This method is used to control the list box
             * It is called when a row is selected by the user, it then displays frmCar
             * with the car details
             */
            if (lstFleet.SelectedIndex > -1)
            {
                int index = lstFleet.SelectedIndex;
                Transport myCar = myFleet.fleet.ElementAt(index);
 
                if (myCar is Car)
                {
                    FrmCar carGui = new FrmCar();
                    carGui.car = (Car)myCar;
                    carGui.Show();
                }
                else
                    if (myCar is Mini)
                    {
                        FrmMini miniGui = new FrmMini();
                        miniGui.mini = (Mini)myCar;
                        miniGui.Show();
                    }
                    else
                        if (myCar is Truck)
                        {
                            FrmTruck truckGui = new FrmTruck();
                            truckGui.truck = (Truck)myCar;
                            truckGui.Show();
                        }
            }
        }
 
        private void FrmHireCo_Load(object sender, EventArgs e)
        {
 
        }
 
        private void FrmHireCo_Activated(object sender, EventArgs e)
        {
            updateFleetList();
            updatecustomerlist();
        }
 
        private void btnAddMini_Click(object sender, EventArgs e)
        {
            //Add a new car
            FrmMini miniGui = new FrmMini();
            miniGui.ShowDialog();
            Mini myMini = miniGui.mini;
            myFleet.addToFleet(myMini);
            updateFleetList();
        }
 
        private void btnAddTruck_Click(object sender, EventArgs e)
        {
            //Add a new car
            FrmTruck truckGui = new FrmTruck();
            truckGui.ShowDialog();
            Truck myTruck = truckGui.truck;
            myFleet.addToFleet(myTruck);
            updateFleetList();
        }
 
        private void btnAddCustomer_Click(object sender, EventArgs e)
        {
            FrmCustomer customerGui = new FrmCustomer();
            customerGui.ShowDialog();
            Customer theCustomer = customerGui.customer;
            NewCustomer.addToCustomerlist(theCustomer);
            updatecustomerlist();
 
 
        }
 
        private void lstCustomers_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (lstCustomers.SelectedIndex > -1)
            {
 
                int index = lstCustomers.SelectedIndex;
                Customer selectedcust = NewCustomer.customerlist.ElementAt(index);
                FrmCustomer customerGui = new FrmCustomer();
                customerGui.customer = selectedcust;
                customerGui.Show();
            }
 
        }
 
        private void FrmHireCo_FormClosing(object sender, FormClosingEventArgs e)
        {
            // Create a new XmlSerializer instance with the type of the test class
            // XmlSerializer SerializerObj = new XmlSerializer(typeof(TestClass));
            // Create a new file stream to write the serialized object to a file
            // TextWriter WriteFileStream = new StreamWriter(@"test.xml");
            // SerializerObj.Serialize(WriteFileStream, TestObj);
            // Cleanup
            // WriteFileStream.Close();
 
            Stream stream = new FileStream(@"MyApplicationData.dat", System.IO.FileMode.Create);
            IFormatter formatter = new BinaryFormatter();
            formatter.Serialize(stream, myFleet.theFleet);
 
            stream.Close();
 
 
 
        }
 
 
 
        private void btnHire_Click(object sender, EventArgs e)
        {
            if (myFleet.fleet.Count == 0)
            {
                MessageBox.Show("No Vehicle's Exist Within The Fleet"); 
            }
 
            else
            foreach (Transport t in myFleet.fleet)
            {
                if (txthirereg.Text == t.reg)
                {
 
                    if (t.hirer == null)
                    {
                        t.hirer = txtcusthire.Text;
                    } 
                    else
                        if (t.hirer == txtcusthire.Text)
                        {
                            MessageBox.Show("This Vehicle is Already Being Hired By This Person");
                        }
                        else
                        {
                            MessageBox.Show("The Customer Number You Have Entered Does Not Exist Within The System \n\n OR \n\n The Vechile Is Already Hired Out");
                        }
                }
                else if (txthirereg.Text == (""))
                {
                    MessageBox.Show("You Have Entered The 2 Required Detials");
                }
 
                else
                {
                    MessageBox.Show("The Registration Number You Have Entered Does Not Exist Within The System");
                }
 
                updateFleetList();
 
            }
        }
 
        private void btnReturn_Click(object sender, EventArgs e)
        {
 
            string search = txthirereg.Text;
 
            if (myFleet.fleet.Count == 0)
            {
                MessageBox.Show("No vehicle Exist Within The Fleet");
            }
 
            else
            {
                foreach (Transport t in myFleet.fleet)
                {
                    if (txthirereg.Text == t.reg)
                    {
                        if (t.hirer == txtcusthire.Text)
                        {
                            t.hirer = null;
 
                        }
                        else
                        {
                            MessageBox.Show("The Customer Number You Have Entered Does Not Exist Within The System \n\n OR \n\n The Vechile Is Already Hired Out");
                        }
                    }
                    else
                    {
                        MessageBox.Show("The Registration Number You Have Entered Does Not Exist Within The System");
                    }
 
                    updateFleetList();
                }
            }
        }
 
 
 
 
 
 
 
 
 
 
    }
}
 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
 
namespace SD2coursework
{
    [Serializable()]
    public class Fleet
    {
        /*
         * This class is used to hold a list of Car objects that make up the fleet:
         * The car objects may be added through the addToFleet() method.
         * The car objects may be deleted tgrough the deleteFromFleet() method 
         * Use the fleet property to access the list of car objects
         */ 
 
        public List<Transport> theFleet = new List<Transport>(); //The list of car objects being stored
        public List<Transport> fleet 
            /* The fleet property. Note that you can only read it
             * use the addToFleet and deleteFromFleet to update it
             */
        {
            get
            {
                return theFleet;
            }
        }
 
        public void deleteFromFleet(Transport a)
            //Delete car from fleet
        {
            theFleet.Remove(a);
        }
 
        public void addToFleet(Transport a)
            //Add car to fleet
        {
            theFleet.Add(a);
        }
 
        public void savefleet()
        {
 
 
        }
 
    }
}
 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace SD2coursework
{
    [Serializable]
    public class Transport
    {
        private string theRegno;
        private string theMake;  //Holds the value of the make property
        private string theModel;
        private string theColour; //Holds the value of the colour property
        private string theHirer;
 
 
 
 
 
        //Default constructor
        public Transport(string aRegno, string aMake, string aModel, string aColour, string aHirer)
        {
            theRegno = aRegno;
            theMake = aMake;
            theModel = aModel;
            theColour = aColour;
            theHirer = aHirer;
 
        }
 
        //Make property
        public string reg
        {
            get
            {
                return theRegno;
            }
            set
            {
                theRegno = value;
            }
        }
        public string make
        {
            get
            {
                return theMake;
            }
            set
            {
                theMake = value;
            }
        }
        public string model
        {
            get
            {
                return theModel;
            }
            set
            {
                theModel = value;
            }
        }
        //Colour property
        public string colour
        {
            get
            {
                return theColour;
            }
            set
            {
                theColour = value;
            }
        }
 
        public string hirer
        {
            get
            {
                return theHirer;
            }
            set
            {
                theHirer = value;
            }
        }
    }
 
}
 
 

Hey Guys,
Been Stuck On Serializing This For A While Ive Gotten Round parameters by using binary. im new to using this so i dont have a clue on how to correct the casting error, wondering if anyone can help

The Exact Error Is As Follows,

Unable to cast object of type 'System.Collections.Generic.List`1[SD2coursework.Transport]' to type 'SD2coursework.Fleet'

[NeoPa]

Someone's going to want the line number of the code that errored too.

[Uta P]

Line 39 On The First Piece Of Code, Sorry About THAT

[Uta P]

I Have Also Tried Using Transport Instead Of Fleet And Error Says Similiar

"Error 1 Cannot implicitly convert type 'SD2coursework.Transport' to 'SD2coursework.Fleet' G:\Software Deelopment Coursework 2\Assessment\WindowsFormsApplication1\FrmHire.cs 39 30 SD2coursework
"