using System.Data.Entity;
public static void Main()
using (var context = new EntityContext())
var list = context.Customers.ToList();
list.ForEach(x => { x.IsActive = false; x.Name += "_NotMerge"; x.Description += "_Merge"; x.IsActive = false; });
context.BulkMerge(list, options =>
options.IgnoreOnMergeUpdateExpression = customer => new {customer.CustomerID, customer.IsActive, customer.Name};
using (var context = new EntityContext())
FiddleHelper.WriteTable(context.Customers.Take(5).ToList());
public static void GenerateData()
using (var context = new EntityContext())
context.Customers.Add(new Customer() { Name ="Customer_A", Description = "Description", IsActive = true });
context.Customers.Add(new Customer() { Name ="Customer_B", Description = "Description", IsActive = true });
context.BulkSaveChanges();
using (var context = new EntityContext())
FiddleHelper.WriteTable(context.Customers.ToList());
public class EntityContext : DbContext
public EntityContext() : base(FiddleHelper.GetConnectionStringSqlServer())
public DbSet<Customer> Customers { get; set; }
public int CustomerID { get; set; }
public string Name { get; set; }
public string Description { get; set; }
public Boolean IsActive { get; set; }