// @nuget: Z.EntityFramework.Classic

// @nuget: Z.EntityFramework.Extensions.Classic

​

using System;

using System.Collections.Generic;

using System.Linq;

using System.Data.Entity;

​

public class Program

{

    class C1 

    {

        public string S1;

    }

    class CustComp : Customer {

        public C1 C1;

    }

    public static void Main()

    {

        GenerateData();

​

        // BulkMerge: MERGE all entities from the database.

        using (var context = new EntityContext())

        {

            var list = context.Customers.ToList();

            list.Add(new Customer() { Name ="Customer_C", Description = "Description"});

            list.First().Description = "Updated_A";

            context.BulkMerge(list);

            FiddleHelper.WriteTable(context.Customers.ToList());    

        }

        var customers = new List<Customer>();

        customers.Add(new Customer() { Name = "Customer_B", Description = "Updated_B", IsActive = false});

        customers.Add(new Customer() { Name = "Customer_D", Description = "Description", IsActive = false});

        // BulkMerge: Easy to customize

        using (var context = new EntityContext())

        {

            context.BulkMerge(customers, options => options.ColumnPrimaryKeyExpression = customer => customer.Name);

            FiddleHelper.WriteTable(context.Customers.ToList());

        }

    }

    public static void GenerateData()

    {

        var custList = new List<Customer>() 

        {

            new CustComp() { Name ="Customer_A", Description = "Description", IsActive = true, C1 = new C1() { S1 = "Test1" }  },

            new CustComp() { Name ="Customer_B", Description = "Description", IsActive = true, C1 = new C1() { S1 = "Test2" }  }

        };

        using (var context = new EntityContext())

        {

            context.Customers.AddRange(custList);

​

            context.BulkSaveChanges();  

        }

        FiddleHelper.Dump((custList[0] as CustComp).C1);

        using (var context = new EntityContext())

        {

            FiddleHelper.WriteTable(custList);  

        }

    }

​

    public class EntityContext : DbContext

    {

        public EntityContext() : base(FiddleHelper.GetConnectionStringSqlServer())

        {

​

        }

        public DbSet<Customer> Customers { get; set; }

    }

    public class Customer

    {

        public int CustomerID { get; set; }

        public string Name { get; set; }

        public string Description { get; set; }

        public Boolean IsActive { get; set; }

    }

}