CREATE TABLE [dbo].[Employee] (  
    [EmpId]     INT          NOT NULL,  
    [FirstName] VARCHAR (20) NOT NULL,  
    [LastName]  VARCHAR (20) NOT NULL,  
    [City]      VARCHAR (20) NOT NULL,  
    PRIMARY KEY CLUSTERED ([EmpId] ASC)  
);

<asp:BoundField DataField="FirstName" HeaderText="First Name" />

<asp:TemplateField>  
                    <ItemTemplate>  
                        <asp:CheckBox ID="chkDel" runat="server" />  
                    </ItemTemplate>  
                </asp:TemplateField>

<asp:Button ID="btnDeleteRecord" runat="server" OnClick="btnDeleteRecord_Click" Text="Delete"  />

function DeleteConfirm() 
        {  
            var Ans = confirm("Do you want to Delete Selected Employee Record?");  
            if (Ans)
            {  
                return true;  
            }  
            else 
            {  
                return false;  
            }  
        }

protected void Page_Load(object sender, EventArgs e)  
{  
    if(!IsPostBack)  
    {  
        //Displaying the Data  
        showData();  
        //Adding an Attribute to Server Control(i.e. btnDeleteRecord)  
        btnDeleteRecord.Attributes.Add("onclick", "javascript:return DeleteConfirm()");  
    }  
}

//Method for Displaying Data  
protected void showData()  
{  
    DataTable dt = new DataTable();  
    SqlConnection con = new SqlConnection(cs);  
    SqlDataAdapter adapt = new SqlDataAdapter("select * from Employee",con);  
    con.Open();  
    adapt.Fill(dt);  
    con.Close();  
    GridView1.DataSource = dt;  
    GridView1.DataBind();  
}

protected void DeleteRecord(int empid)  
{  
    SqlConnection con = new SqlConnection(cs);  
    SqlCommand com = new SqlCommand("delete from Employee where EmpId=@ID",con);  
    com.Parameters.AddWithValue("@ID",empid);  
    con.Open();  
    com.ExecuteNonQuery();  
    con.Close();  
}

protected void btnDeleteRecord_Click(object sender, EventArgs e)  
{  
    foreach (GridViewRow grow in GridView1.Rows)  
    {  
        //Searching CheckBox("chkDel") in an individual row of Grid  
        CheckBox chkdel = (CheckBox)grow.FindControl("chkDel");  
        //If CheckBox is checked than delete the record with particular empid  
        if(chkdel.Checked)  
        {  
            int empid = Convert.ToInt32(grow.Cells[1].Text);  
            DeleteRecord(empid);  
        }  
    }  
    //Displaying the Data in GridView  
    showData();  
}

namespace MyNewsWCFLibrary
{
    using System;
    using System.Collections.Generic;
    
    public partial class tblNews
    {
        public int tblNewsId { get; set; }
        public int tblCategoryId { get; set; }
        public string Title { get; set; }
        public string Description { get; set; }
        public System.DateTime RegDate { get; set; }
        public Nullable<bool> IsDeleted { get; set; }
    
        public virtual tblCategory tblCategory { get; set; }
    }
}

using System.Runtime.Serialization;

namespace MyNewsWCFLibrary
{
    using System;
    using System.Collections.Generic;
    
    [DataContract]
    public partial class tblNews
    {
        [DataMember]
        public int tblNewsId { get; set; }
        [DataMember]
        public int tblCategoryId { get; set; }
        [DataMember]
        public string Title { get; set; }
        [DataMember]
        public string Description { get; set; }
        [DataMember]
        public System.DateTime RegDate { get; set; }
        [DataMember]
        public Nullable<bool> IsDeleted { get; set; }

        public virtual tblCategory tblCategory { get; set; }
    }
}

BEGIN TRANSACTION
GO
ALTER TABLE dbo.tblNews
DROP CONSTRAINT FK_tblNews_tblCategory
GO
ALTER TABLE dbo.tblCategory SET (LOCK_ESCALATION = TABLE)
GO
COMMIT
BEGIN TRANSACTION
GO
CREATE TABLE dbo.Tmp_tblNews
(
tblNewsId int NOT NULL IDENTITY (1, 1),
tblCategoryId int NOT NULL,
Title nvarchar(50) NOT NULL,
Description nvarchar(MAX) NOT NULL,
RegDate datetime NOT NULL,
IsDeleted bit NOT NULL
)  ON [PRIMARY]
 TEXTIMAGE_ON [PRIMARY]
GO
ALTER TABLE dbo.Tmp_tblNews SET (LOCK_ESCALATION = TABLE)
GO
ALTER TABLE dbo.Tmp_tblNews ADD CONSTRAINT
DF_tblNews_IsDeleted DEFAULT 0 FOR IsDeleted
GO
SET IDENTITY_INSERT dbo.Tmp_tblNews ON
GO
IF EXISTS(SELECT * FROM dbo.tblNews)
 EXEC('INSERT INTO dbo.Tmp_tblNews (tblNewsId, tblCategoryId, Title, Description, RegDate, IsDeleted)
SELECT tblNewsId, tblCategoryId, Title, Description, RegDate, IsDeleted FROM dbo.tblNews WITH (HOLDLOCK TABLOCKX)')
GO
SET IDENTITY_INSERT dbo.Tmp_tblNews OFF
GO
DROP TABLE dbo.tblNews
GO
EXECUTE sp_rename N'dbo.Tmp_tblNews', N'tblNews', 'OBJECT' 
GO
ALTER TABLE dbo.tblNews ADD CONSTRAINT
PK_tblNews PRIMARY KEY CLUSTERED 
(
tblNewsId
) WITH( STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

GO
ALTER TABLE dbo.tblNews ADD CONSTRAINT
FK_tblNews_tblCategory FOREIGN KEY
(
tblCategoryId
) REFERENCES dbo.tblCategory
(
tblCategoryId
) ON UPDATE  NO ACTION 
 ON DELETE  NO ACTION 

GO
COMMIT

    public enum PersistType
    {
        Persistable = 1,
        NotPersist = 2,
        AlwaysPersist = 3
    }

        public static string ConvertEnumToJavascript(Type t)
        {
            if (!t.IsEnum) throw new Exception("Type must be an enumeration");

            var values = System.Enum.GetValues(t);
            var dict = new Dictionary<int, string>();

            foreach (object obj in values)
            {
                string name = System.Enum.GetName(t, obj);
                dict.Add(Convert.ToInt32(System.Enum.Format(t, obj, "D")), name);
            }

            return new JavaScriptSerializer().Serialize(dict);
        }

var Enum_PersistType = null;

function SetEnumTypes() {
    Enum_PersistType = JSON.parse($('#hfJsonEnum_PersistType').val());
}

function GetPersistTypeTitle_Concept(enumId) {
    return Enum_PersistType[enumId];
}

function FillDropdown() {
    $("#ddlPersistType").html("");
    $.each(Enum_PersistType, function (key, value) {
        $("#ddlPersistType").append($("<option></option>").val(key).html(value));
    });
}

...
     .ConnectionString(x => x.FromConnectionStringWithKey(...))
     .Cache(x => x.UseQueryCache()
                           .UseMinimalPuts()
                           .ProviderClass<NHibernate.Caches.SysCache.SysCacheProvider>())
...

using FluentNHibernate.Automapping.Alterations;

namespace NH3Test.MappingDefinitions.Domain
{
   public class AccountOverrides : IAutoMappingOverride<Account>
   {
       public void Override(FluentNHibernate.Automapping.AutoMapping<Account> mapping)
       {
           mapping.Cache.ReadWrite();
       }
   }
}

var data = session.QueryOver<Account>()
                 .Where(s => s.Name == "name")
                 .Cacheable()
                 .List();

namespace NHSample1.Domain
{
   public class Product
   {
       public int Id { get; set; }
       public string Name { get; set; }
       public decimal UnitPrice { get; set; }
       public bool Discontinued { get; set; }
   }
}

using FluentNHibernate.Mapping;
using NHSample1.Domain;

namespace NHSample1.Mappings
{
   public class ProductMapping : ClassMap<Product>
   {
       public ProductMapping()
       {
           Not.LazyLoad();
           Id(p => p.Id).GeneratedBy.HiLo("1000");
           Map(p => p.Name).Length(50).Not.Nullable();
           Map(p => p.UnitPrice).Not.Nullable();
           Map(p => p.Discontinued).Not.Nullable();
       }
   }
}

using NUnit.Framework;
using FluentNHibernate.Testing;
using NHSample1.Domain;

namespace UnitTests
{
   [TestFixture]
   public class ProductMapping_Fixture : FixtureBase
   {
       [Test]
       public void can_correctly_map_product()
       {
           new PersistenceSpecification<Product>(Session)
                   .CheckProperty(p => p.Id, 1001)
                   .CheckProperty(p => p.Name, "Apples")
                   .CheckProperty(p => p.UnitPrice, 10.45m)
                   .CheckProperty(p => p.Discontinued, true)
                   .VerifyTheMappings();
       }
   }
}

ProductMapping_Fixture.can_correctly_map_product : Passed
NHibernate: select next_hi from hibernate_unique_key
NHibernate: update hibernate_unique_key set next_hi = @p0 where next_hi = @p1;@p0 = 2, @p1 = 1
NHibernate: INSERT INTO "Product" (Name, UnitPrice, Discontinued, Id) VALUES (@p0, @p1, @p2, @p3);@p0 = 'Apples', @p1 = 10.45, @p2 = True, @p3 = 1001
NHibernate: SELECT product0_.Id as Id1_0_, product0_.Name as Name1_0_, product0_.UnitPrice as UnitPrice1_0_, product0_.Discontinued as Disconti4_1_0_ FROM "Product" product0_ WHERE product0_.Id=@p0;@p0 = 1001

using System;
namespace NHSample1.Domain
{
   public class Employee
   {
       public int Id { set; get; }
       public string LastName { get; set; }
       public string FirstName { get; set; }
   }
}

using NHSample1.Domain;
using FluentNHibernate.Mapping;

namespace NHSample1.Mappings
{
   public class EmployeeMapping : ClassMap<Employee>
   {
       public EmployeeMapping()
       {
           Not.LazyLoad();
           Id(e => e.Id).GeneratedBy.Assigned();
           Map(e => e.LastName).Length(50);
           Map(e => e.FirstName).Length(50);
       }
   }
}

using NUnit.Framework;
using NHSample1.Domain;
using FluentNHibernate.Testing;

namespace UnitTests
{
   [TestFixture]
   public class EmployeeMapping_Fixture : FixtureBase
   {
       [Test]
       public void can_correctly_map_employee()
       {
           new PersistenceSpecification<Employee>(Session)
                   .CheckProperty(p => p.Id, 1001)
                   .CheckProperty(p => p.FirstName, "name1")
                   .CheckProperty(p => p.LastName, "lname1")
                   .VerifyTheMappings();
       }
   }
}

NHibernate: select next_hi from hibernate_unique_key
NHibernate: update hibernate_unique_key set next_hi = @p0 where next_hi = @p1;@p0 = 2, @p1 = 1
NHibernate: INSERT INTO "Employee" (LastName, FirstName, Id) VALUES (@p0, @p1, @p2);@p0 = 'lname1', @p1 = 'name1', @p2 = 1001
NHibernate: SELECT employee0_.Id as Id4_0_, employee0_.LastName as LastName4_0_, employee0_.FirstName as FirstName4_0_ FROM "Employee" employee0_ WHERE employee0_.Id=@p0;@p0 = 1001

namespace NHSample1.Domain
{
   public class OrderItem
   {
       public int Id { get; set; }
       public int Quantity { get; set; }
       public Product Product { get; set; }
   }
}

using FluentNHibernate.Mapping;
using NHSample1.Domain;

namespace NHSample1.Mappings
{
   public class OrderItemMapping : ClassMap<OrderItem>
   {
       public OrderItemMapping()
       {
           Not.LazyLoad();
           Id(oi => oi.Id).GeneratedBy.Assigned();
           Map(oi => oi.Quantity).Not.Nullable();
           References(oi => oi.Product).Not.Nullable();
       }
   }
}

using NUnit.Framework;
using NHSample1.Domain;
using FluentNHibernate.Testing;

namespace UnitTests
{
   [TestFixture]
   public class OrderItemMapping_Fixture : FixtureBase
   {
       [Test]
       public void can_correctly_map_order_item()
       {
           var product = new Product
           {
               Name = "Apples",
               UnitPrice = 4.5m,
               Discontinued = true
           };

           new PersistenceSpecification<OrderItem>(Session)
                       .CheckProperty(p => p.Id, 1)
                       .CheckProperty(p => p.Quantity, 5)
                       .CheckReference(p => p.Product, product)
                       .VerifyTheMappings();
       }
   }
}

using System.Collections;
using NHSample1.Domain;

namespace UnitTests
{
   public class CustomEqualityComparer : IEqualityComparer
   {
       public bool Equals(object x, object y)
       {
           if (ReferenceEquals(x, y)) return true;
           if (x == null || y == null) return false;

           if (x is Product && y is Product)
               return (x as Product).Id == (y as Product).Id;

           if (x is Customer && y is Customer)
               return (x as Customer).Id == (y as Customer).Id;

           if (x is Employee && y is Employee)
               return (x as Employee).Id == (y as Employee).Id;

           if (x is OrderItem && y is OrderItem)
               return (x as OrderItem).Id == (y as OrderItem).Id;
          

           return x.Equals(y);
       }

       public int GetHashCode(object obj)
       {
           //شاید وقتی دیگر
           return obj.GetHashCode();
       }
   }
}

new PersistenceSpecification<OrderItem>(Session, new CustomEqualityComparer())

NHibernate: select next_hi from hibernate_unique_key
NHibernate: update hibernate_unique_key set next_hi = @p0 where next_hi = @p1;@p0 = 2, @p1 = 1
NHibernate: INSERT INTO "Product" (Name, UnitPrice, Discontinued, Id) VALUES (@p0, @p1, @p2, @p3);@p0 = 'Apples', @p1 = 4.5, @p2 = True, @p3 = 1001
NHibernate: INSERT INTO "OrderItem" (Quantity, Product_id, Id) VALUES (@p0, @p1, @p2);@p0 = 5, @p1 = 1001, @p2 = 1
NHibernate: SELECT orderitem0_.Id as Id0_1_, orderitem0_.Quantity as Quantity0_1_, orderitem0_.Product_id as Product3_0_1_, product1_.Id as Id3_0_, product1_.Name as Name3_0_, product1_.UnitPrice as UnitPrice3_0_, product1_.Discontinued as Disconti4_3_0_ FROM "OrderItem" orderitem0_ inner join "Product" product1_ on orderitem0_.Product_id=product1_.Id WHERE orderitem0_.Id=@p0;@p0 = 1

using System;
using System.Collections.Generic;

namespace NHSample1.Domain
{
   public class Order
   {
       public int Id { set; get; }
       public DateTime OrderDate { get; set; }
       public Employee Employee { get; set; }
       public Customer Customer { get; set; }
       public IList<OrderItem> OrderItems { get; set; }
   }
}

using NHSample1.Domain;
using FluentNHibernate.Mapping;

namespace NHSample1.Mappings
{
   public class OrderMapping : ClassMap<Order>
   {
       public OrderMapping()
       {
           Not.LazyLoad();
           Id(o => o.Id).GeneratedBy.GuidComb();
           Map(o => o.OrderDate).Not.Nullable();
           References(o => o.Employee).Not.Nullable();
           References(o => o.Customer).Not.Nullable();
           HasMany(o => o.OrderItems)
               .AsList(index => index.Column("ListIndex").Type<int>());
       }
   }
}

using System;
using System.Collections.Generic;
using NUnit.Framework;
using NHSample1.Domain;
using FluentNHibernate.Testing;

namespace UnitTests
{
   [TestFixture]
   public class OrderMapping_Fixture : FixtureBase
   {
       [Test]
       public void can_correctly_map_an_order()
       {
           {
               var product1 =
                   new Product
                   {
                       Name = "Apples",
                       UnitPrice = 4.5m,
                       Discontinued = true
                   };
               var product2 =
                   new Product
                   {
                       Name = "Pears",
                       UnitPrice = 3.5m,
                       Discontinued = false
                   };

               Session.Save(product1);
               Session.Save(product2);

               var items = new List<OrderItem>
                               {
                                   new OrderItem
                                   {
                                       Id = 1,
                                       Quantity = 100,
                                       Product = product1
                                   },
                                   new OrderItem
                                   {
                                       Id = 2,
                                       Quantity = 200,
                                       Product = product2
                                   }
                               };

               var customer = new Customer
               {
                   FirstName = "Vahid",
                   LastName = "Nasiri",
                   AddressLine1 = "Addr1",
                   AddressLine2 = "Addr2",
                   PostalCode = "1234",
                   City = "Tehran",
                   CountryCode = "IR"
               };

               var employee =
                   new Employee
                   {
                       FirstName = "name1",
                       LastName = "lname1"
                   };


              
               var order = new Order
               {
                   Customer = customer,
                   Employee = employee,
                   OrderDate = DateTime.Today,
                   OrderItems = items
               };

               new PersistenceSpecification<Order>(Session, new CustomEqualityComparer())
                   .CheckProperty(o => o.OrderDate, order.OrderDate)
                   .CheckReference(o => o.Customer, order.Customer)
                   .CheckReference(o => o.Employee, order.Employee)
                   .CheckList(o => o.OrderItems, order.OrderItems)
                   .VerifyTheMappings();
           }
       }
   }
}

OrderMapping_Fixture.can_correctly_map_an_order : Passed
NHibernate: select next_hi from hibernate_unique_key
NHibernate: update hibernate_unique_key set next_hi = @p0 where next_hi = @p1;@p0 = 2, @p1 = 1
NHibernate: select next_hi from hibernate_unique_key
NHibernate: update hibernate_unique_key set next_hi = @p0 where next_hi = @p1;@p0 = 3, @p1 = 2
NHibernate: INSERT INTO "Product" (Name, UnitPrice, Discontinued, Id) VALUES (@p0, @p1, @p2, @p3);@p0 = 'Apples', @p1 = 4.5, @p2 = True, @p3 = 1001
NHibernate: INSERT INTO "Product" (Name, UnitPrice, Discontinued, Id) VALUES (@p0, @p1, @p2, @p3);@p0 = 'Pears', @p1 = 3.5, @p2 = False, @p3 = 1002
NHibernate: INSERT INTO "Customer" (FirstName, LastName, AddressLine1, AddressLine2, PostalCode, City, CountryCode, Id) VALUES (@p0, @p1, @p2, @p3, @p4, @p5, @p6, @p7);@p0 = 'Vahid', @p1 = 'Nasiri', @p2 = 'Addr1', @p3 = 'Addr2', @p4 = '1234', @p5 = 'Tehran', @p6 = 'IR', @p7 = 2002
NHibernate: select next_hi from hibernate_unique_key
NHibernate: update hibernate_unique_key set next_hi = @p0 where next_hi = @p1;@p0 = 4, @p1 = 3
NHibernate: INSERT INTO "Employee" (LastName, FirstName, Id) VALUES (@p0, @p1, @p2);@p0 = 'lname1', @p1 = 'name1', @p2 = 3003
NHibernate: INSERT INTO "OrderItem" (Quantity, Product_id, Id) VALUES (@p0, @p1, @p2);@p0 = 100, @p1 = 1001, @p2 = 1
NHibernate: INSERT INTO "OrderItem" (Quantity, Product_id, Id) VALUES (@p0, @p1, @p2);@p0 = 200, @p1 = 1002, @p2 = 2
NHibernate: INSERT INTO "Order" (OrderDate, Employee_id, Customer_id, Id) VALUES (@p0, @p1, @p2, @p3);@p0 = 2009/10/10 12:00:00 ق.ظ, @p1 = 3003, @p2 = 2002, @p3 = 0
NHibernate: UPDATE "OrderItem" SET Order_id = @p0, ListIndex = @p1 WHERE Id = @p2;@p0 = 0, @p1 = 0, @p2 = 1
NHibernate: UPDATE "OrderItem" SET Order_id = @p0, ListIndex = @p1 WHERE Id = @p2;@p0 = 0, @p1 = 1, @p2 = 2
NHibernate: SELECT order0_.Id as Id1_2_, order0_.OrderDate as OrderDate1_2_, order0_.Employee_id as Employee3_1_2_, order0_.Customer_id as Customer4_1_2_, employee1_.Id as Id4_0_, employee1_.LastName as LastName4_0_, employee1_.FirstName as FirstName4_0_, customer2_.Id as Id2_1_, customer2_.FirstName as FirstName2_1_, customer2_.LastName as LastName2_1_, customer2_.AddressLine1 as AddressL4_2_1_, customer2_.AddressLine2 as AddressL5_2_1_, customer2_.PostalCode as PostalCode2_1_, customer2_.City as City2_1_, customer2_.CountryCode as CountryC8_2_1_ FROM "Order" order0_ inner join "Employee" employee1_ on order0_.Employee_id=employee1_.Id inner join "Customer" customer2_ on order0_.Customer_id=customer2_.Id WHERE order0_.Id=@p0;@p0 = 0
NHibernate: SELECT orderitems0_.Order_id as Order4_2_, orderitems0_.Id as Id2_, orderitems0_.ListIndex as ListIndex2_, orderitems0_.Id as Id0_1_, orderitems0_.Quantity as Quantity0_1_, orderitems0_.Product_id as Product3_0_1_, product1_.Id as Id3_0_, product1_.Name as Name3_0_, product1_.UnitPrice as UnitPrice3_0_, product1_.Discontinued as Disconti4_3_0_ FROM "OrderItem" orderitems0_ inner join "Product" product1_ on orderitems0_.Product_id=product1_.Id WHERE orderitems0_.Order_id=@p0;@p0 = 0

SessionSource.BuildSchema(Session, true);

    drop table if exists "OrderItem"

    drop table if exists "Order"

    drop table if exists "Customer"

    drop table if exists "Product"

    drop table if exists "Employee"

    drop table if exists hibernate_unique_key

    create table "OrderItem" (
        Id INTEGER not null,
       Quantity INTEGER not null,
       Product_id INTEGER not null,
       Order_id INTEGER,
       ListIndex INTEGER,
       primary key (Id)
    )

    create table "Order" (
        Id INTEGER not null,
       OrderDate DATETIME not null,
       Employee_id INTEGER not null,
       Customer_id INTEGER not null,
       primary key (Id)
    )

    create table "Customer" (
        Id INTEGER not null,
       FirstName TEXT not null,
       LastName TEXT not null,
       AddressLine1 TEXT not null,
       AddressLine2 TEXT,
       PostalCode TEXT not null,
       City TEXT not null,
       CountryCode TEXT not null,
       primary key (Id)
    )

    create table "Product" (
        Id INTEGER not null,
       Name TEXT not null,
       UnitPrice NUMERIC not null,
       Discontinued INTEGER not null,
       primary key (Id)
    )

    create table "Employee" (
        Id INTEGER not null,
       LastName TEXT,
       FirstName TEXT,
       primary key (Id)
    )

    create table hibernate_unique_key (
         next_hi INTEGER
    )

           var cfg = Fluently.Configure().Database(
              // SQLiteConfiguration.Standard.ShowSql().InMemory
              MsSqlConfiguration
              .MsSql2008
              .ShowSql()
              .ConnectionString("Data Source=(local);Initial Catalog=testdb2009;Integrated Security = true")
               );

    if exists (select 1 from sys.objects where object_id = OBJECT_ID(N'[FK3EF88858466CFBF7]') AND parent_object_id = OBJECT_ID('[OrderItem]'))
alter table [OrderItem]  drop constraint FK3EF88858466CFBF7


    if exists (select 1 from sys.objects where object_id = OBJECT_ID(N'[FK3EF888589F32DE52]') AND parent_object_id = OBJECT_ID('[OrderItem]'))
alter table [OrderItem]  drop constraint FK3EF888589F32DE52


    if exists (select 1 from sys.objects where object_id = OBJECT_ID(N'[FK3117099B1EBA72BC]') AND parent_object_id = OBJECT_ID('[Order]'))
alter table [Order]  drop constraint FK3117099B1EBA72BC


    if exists (select 1 from sys.objects where object_id = OBJECT_ID(N'[FK3117099BB2F9593A]') AND parent_object_id = OBJECT_ID('[Order]'))
alter table [Order]  drop constraint FK3117099BB2F9593A


    if exists (select * from dbo.sysobjects where id = object_id(N'[OrderItem]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table [OrderItem]

    if exists (select * from dbo.sysobjects where id = object_id(N'[Order]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table [Order]

    if exists (select * from dbo.sysobjects where id = object_id(N'[Customer]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table [Customer]

    if exists (select * from dbo.sysobjects where id = object_id(N'[Product]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table [Product]

    if exists (select * from dbo.sysobjects where id = object_id(N'[Employee]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table [Employee]

    if exists (select * from dbo.sysobjects where id = object_id(N'hibernate_unique_key') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table hibernate_unique_key

    create table [OrderItem] (
        Id INT not null,
       Quantity INT not null,
       Product_id INT not null,
       Order_id INT null,
       ListIndex INT null,
       primary key (Id)
    )

    create table [Order] (
        Id INT not null,
       OrderDate DATETIME not null,
       Employee_id INT not null,
       Customer_id INT not null,
       primary key (Id)
    )

    create table [Customer] (
        Id INT not null,
       FirstName NVARCHAR(50) not null,
       LastName NVARCHAR(50) not null,
       AddressLine1 NVARCHAR(50) not null,
       AddressLine2 NVARCHAR(50) null,
       PostalCode NVARCHAR(10) not null,
       City NVARCHAR(50) not null,
       CountryCode NVARCHAR(2) not null,
       primary key (Id)
    )

    create table [Product] (
        Id INT not null,
       Name NVARCHAR(50) not null,
       UnitPrice DECIMAL(19,5) not null,
       Discontinued BIT not null,
       primary key (Id)
    )

    create table [Employee] (
        Id INT not null,
       LastName NVARCHAR(50) null,
       FirstName NVARCHAR(50) null,
       primary key (Id)
    )

    alter table [OrderItem]
        add constraint FK3EF88858466CFBF7
        foreign key (Product_id)
        references [Product]

    alter table [OrderItem]
        add constraint FK3EF888589F32DE52
        foreign key (Order_id)
        references [Order]

    alter table [Order]
        add constraint FK3117099B1EBA72BC
        foreign key (Employee_id)
        references [Employee]

    alter table [Order]
        add constraint FK3117099BB2F9593A
        foreign key (Customer_id)
        references [Customer]

    create table hibernate_unique_key (
         next_hi INT
    )

Lazy<ExpensiveResource> ownedResource = new Lazy<ExpensiveResource>();

public Lazy(bool isThreadSafe);
public Lazy(Func<T> valueFactory, bool isThreadSafe);

using System;
using System.Threading;

namespace LazyExample
{
 class Program
 {
     static void Main()
     {
         Console.WriteLine("Before assignment");
         var slow = new Lazy<Slow>();
         Console.WriteLine("After assignment");

         Thread.Sleep(1000);

         Console.WriteLine(slow);
         Console.WriteLine(slow.Value);

         Console.WriteLine("Press a key...");
         Console.Read();
     }
 }


 class Slow
 {
     public Slow()
     {
         Console.WriteLine("Start creation");
         Thread.Sleep(2000);
         Console.WriteLine("End creation");
     }
 }
}

Before assignment
After assignment
Value is not created.
Start creation
End creation
LazyExample.Slow
Press a key...

using System;

namespace LazySample
{
 class Program
 {
     static void Main()
     {
         var expensiveClass =
             new Lazy<ExpensiveClass>
             (
                 () =>
                 {
                     var fobj = new ExpensiveClass
                                    {
                         SomeProperty = 100
                     };
                     return fobj;
                 }
             );

         Console.WriteLine("expensiveClass has value yet {0}",
             expensiveClass.IsValueCreated);

         Console.WriteLine("expensiveClass.SomeProperty value {0}",
             (expensiveClass.Value).SomeProperty);

         Console.WriteLine("expensiveClass has value yet {0}",
             expensiveClass.IsValueCreated);

         Console.WriteLine("Press a key...");
         Console.Read();
     }
 }

 class ExpensiveClass
 {
     public int SomeProperty { get; set; }

     public ExpensiveClass()
     {
         Console.WriteLine("ExpensiveClass constructed");
     }
 }
}

       @Html.RenderInput(
        Attributes.Configure()
            .AddType("text")
            .AddId("UserId")
            .AddName("UserId")
            .AddCssClass("TxtBoxCssClass")
    )

<input class="TxtBoxCssClass" id="UserId" name="UserId" type="text">

public class Attributes : RouteValueDictionary    {
        /// <summary>
        /// Configures this instance.
        /// </summary>
        /// <returns></returns>
        public static Attributes Configure()
        {
            return new Attributes();
        }

        /// <summary>
        /// Adds the type.
        /// </summary>
        /// <param name="value">The value.</param>
        public Attributes AddType(string value)
        {
            this.Add("type", value);
            return this;
        }

        /// <summary>
        /// Adds the name.
        /// </summary>
        /// <param name="value">The value.</param>
        public Attributes AddName(string value)
        {
            this.Add("name", value);
            return this;
        }

        /// <summary>
        /// Adds the id.
        /// </summary>
        /// <param name="value">The value.</param>
        public Attributes AddId(string value)
        {
            this.Add("id", value);
            return this;
        }

        /// <summary>
        /// Adds the value.
        /// </summary>
        /// <param name="value">The value.</param>
        public Attributes AddValue(string value)
        {
            this.Add("value", value);
            return this;
        }

        /// <summary>
        /// Adds the CSS class.
        /// </summary>
        /// <param name="value">The value.</param>
        public Attributes AddCssClass(string value)
        {
            this.Add("class", value);
            return this;
        }
    }

        public static MvcHtmlString RenderInput(this HtmlHelper htmlHelper, Attributes attributes)
        {
            TagBuilder input = new TagBuilder("input");
            input.MergeAttributes(attributes);
            return new MvcHtmlString(input.ToString(TagRenderMode.SelfClosing));
        }