A Beginner's Tutorial on Understanding Table Per Hierarchy(TPH) Inheritance in Entity Framework

//------------------------------------------------------------------------------
// <auto-generated>
//    This code was generated from a template.
//
//    Manual changes to this file may cause unexpected behavior in your application.
//    Manual changes to this file will be overwritten if the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

using System;
using System.Data.Objects;
using System.Data.Objects.DataClasses;
using System.Data.EntityClient;
using System.ComponentModel;
using System.Xml.Serialization;
using System.Runtime.Serialization;

[assembly: EdmSchemaAttribute()]

namespace DataAccessLayer
{
    #region Contexts
    
    /// <summary>
    /// No Metadata Documentation available.
    /// </summary>
    public partial class CarsDbEntities : ObjectContext
    {
        #region Constructors
    
        /// <summary>
        /// Initializes a new CarsDbEntities object using the connection string found in the 'CarsDbEntities' section of the application configuration file.
        /// </summary>
        public CarsDbEntities() : base("name=CarsDbEntities", "CarsDbEntities")
        {
            this.ContextOptions.LazyLoadingEnabled = true;
            OnContextCreated();
        }
    
        /// <summary>
        /// Initialize a new CarsDbEntities object.
        /// </summary>
        public CarsDbEntities(string connectionString) : base(connectionString, "CarsDbEntities")
        {
            this.ContextOptions.LazyLoadingEnabled = true;
            OnContextCreated();
        }
    
        /// <summary>
        /// Initialize a new CarsDbEntities object.
        /// </summary>
        public CarsDbEntities(EntityConnection connection) : base(connection, "CarsDbEntities")
        {
            this.ContextOptions.LazyLoadingEnabled = true;
            OnContextCreated();
        }
    
        #endregion
    
        #region Partial Methods
    
        partial void OnContextCreated();
    
        #endregion
    
        #region ObjectSet Properties
    
        /// <summary>
        /// No Metadata Documentation available.
        /// </summary>
        public ObjectSet<Car> Cars
        {
            get
            {
                if ((_Cars == null))
                {
                    _Cars = base.CreateObjectSet<Car>("Cars");
                }
                return _Cars;
            }
        }
        private ObjectSet<Car> _Cars;

        #endregion
        #region AddTo Methods
    
        /// <summary>
        /// Deprecated Method for adding a new object to the Cars EntitySet. Consider using the .Add method of the associated ObjectSet&lt;T&gt; property instead.
        /// </summary>
        public void AddToCars(Car car)
        {
            base.AddObject("Cars", car);
        }

        #endregion
    }
    

    #endregion
    
    #region Entities
    
    /// <summary>
    /// No Metadata Documentation available.
    /// </summary>
    [EdmEntityTypeAttribute(NamespaceName="TestDbModel", Name="Car")]
    [Serializable()]
    [DataContractAttribute(IsReference=true)]
    [KnownTypeAttribute(typeof(DiscountedCar))]
    [KnownTypeAttribute(typeof(PreOwnedCar))]
    public abstract partial class Car : EntityObject
    {
        #region Primitive Properties
    
        /// <summary>
        /// No Metadata Documentation available.
        /// </summary>
        [EdmScalarPropertyAttribute(EntityKeyProperty=true, IsNullable=false)]
        [DataMemberAttribute()]
        public global::System.Int32 CarID
        {
            get
            {
                return _CarID;
            }
            set
            {
                if (_CarID != value)
                {
                    OnCarIDChanging(value);
                    ReportPropertyChanging("CarID");
                    _CarID = StructuralObject.SetValidValue(value);
                    ReportPropertyChanged("CarID");
                    OnCarIDChanged();
                }
            }
        }
        private global::System.Int32 _CarID;
        partial void OnCarIDChanging(global::System.Int32 value);
        partial void OnCarIDChanged();
    
        /// <summary>
        /// No Metadata Documentation available.
        /// </summary>
        [EdmScalarPropertyAttribute(EntityKeyProperty=false, IsNullable=true)]
        [DataMemberAttribute()]
        public global::System.String CarName
        {
            get
            {
                return _CarName;
            }
            set
            {
                OnCarNameChanging(value);
                ReportPropertyChanging("CarName");
                _CarName = StructuralObject.SetValidValue(value, true);
                ReportPropertyChanged("CarName");
                OnCarNameChanged();
            }
        }
        private global::System.String _CarName;
        partial void OnCarNameChanging(global::System.String value);
        partial void OnCarNameChanged();
    
        /// <summary>
        /// No Metadata Documentation available.
        /// </summary>
        [EdmScalarPropertyAttribute(EntityKeyProperty=false, IsNullable=true)]
        [DataMemberAttribute()]
        public global::System.String Manufacturer
        {
            get
            {
                return _Manufacturer;
            }
            set
            {
                OnManufacturerChanging(value);
                ReportPropertyChanging("Manufacturer");
                _Manufacturer = StructuralObject.SetValidValue(value, true);
                ReportPropertyChanged("Manufacturer");
                OnManufacturerChanged();
            }
        }
        private global::System.String _Manufacturer;
        partial void OnManufacturerChanging(global::System.String value);
        partial void OnManufacturerChanged();

        #endregion
    
    }
    
    /// <summary>
    /// No Metadata Documentation available.
    /// </summary>
    [EdmEntityTypeAttribute(NamespaceName="TestDbModel", Name="DiscountedCar")]
    [Serializable()]
    [DataContractAttribute(IsReference=true)]
    public partial class DiscountedCar : Car
    {
        #region Factory Method
    
        /// <summary>
        /// Create a new DiscountedCar object.
        /// </summary>
        /// <param name="carID">Initial value of the CarID property.</param>
        /// <param name="discountRate">Initial value of the DiscountRate property.</param>
        public static DiscountedCar CreateDiscountedCar(global::System.Int32 carID, global::System.Int32 discountRate)
        {
            DiscountedCar discountedCar = new DiscountedCar();
            discountedCar.CarID = carID;
            discountedCar.DiscountRate = discountRate;
            return discountedCar;
        }

        #endregion
        #region Primitive Properties
    
        /// <summary>
        /// No Metadata Documentation available.
        /// </summary>
        [EdmScalarPropertyAttribute(EntityKeyProperty=false, IsNullable=false)]
        [DataMemberAttribute()]
        public global::System.Int32 DiscountRate
        {
            get
            {
                return _DiscountRate;
            }
            set
            {
                OnDiscountRateChanging(value);
                ReportPropertyChanging("DiscountRate");
                _DiscountRate = StructuralObject.SetValidValue(value);
                ReportPropertyChanged("DiscountRate");
                OnDiscountRateChanged();
            }
        }
        private global::System.Int32 _DiscountRate;
        partial void OnDiscountRateChanging(global::System.Int32 value);
        partial void OnDiscountRateChanged();

        #endregion
    
    }
    
    /// <summary>
    /// No Metadata Documentation available.
    /// </summary>
    [EdmEntityTypeAttribute(NamespaceName="TestDbModel", Name="PreOwnedCar")]
    [Serializable()]
    [DataContractAttribute(IsReference=true)]
    public partial class PreOwnedCar : Car
    {
        #region Factory Method
    
        /// <summary>
        /// Create a new PreOwnedCar object.
        /// </summary>
        /// <param name="carID">Initial value of the CarID property.</param>
        /// <param name="yearsOld">Initial value of the YearsOld property.</param>
        public static PreOwnedCar CreatePreOwnedCar(global::System.Int32 carID, global::System.Int32 yearsOld)
        {
            PreOwnedCar preOwnedCar = new PreOwnedCar();
            preOwnedCar.CarID = carID;
            preOwnedCar.YearsOld = yearsOld;
            return preOwnedCar;
        }

        #endregion
        #region Primitive Properties
    
        /// <summary>
        /// No Metadata Documentation available.
        /// </summary>
        [EdmScalarPropertyAttribute(EntityKeyProperty=false, IsNullable=false)]
        [DataMemberAttribute()]
        public global::System.Int32 YearsOld
        {
            get
            {
                return _YearsOld;
            }
            set
            {
                OnYearsOldChanging(value);
                ReportPropertyChanging("YearsOld");
                _YearsOld = StructuralObject.SetValidValue(value);
                ReportPropertyChanged("YearsOld");
                OnYearsOldChanged();
            }
        }
        private global::System.Int32 _YearsOld;
        partial void OnYearsOldChanging(global::System.Int32 value);
        partial void OnYearsOldChanged();

        #endregion
    
    }

    #endregion
    
}