// Entity Framework Classic

// Doc: https://entityframework-classic.net/audit

​

// @nuget: Z.EntityFramework.Classic

​

using System;

using System.Linq;

using System.Collections.Generic;

using System.Data.Entity;

using Z.EntityFramework.Classic;

​

public class Program

{

    public class EntityContext : DbContext

    {

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

        {

            // Add your configuration here

            this.Configuration.Audit.AutoSaveSet = this.AuditEntries;

            this.Configuration.Audit.IsEnabled = true;

        }

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

        public DbSet<AuditEntry> AuditEntries { get; set; }

    }

    public static void Main()

    {

        using (var context = new EntityContext())

        {

            var customerA = new Customer() { Name = "Customer_A", Description = "Description" };

            context.Customers.Add(customerA);

            var customerB = new Customer() { Name = "Customer_B", Description = "Description" };

            context.Customers.Add(customerB);

            // Save changes and Audit trail in database

            context.SaveChanges();

​

            // Display Audit trail

            // Gets the audit trail of the specific key. 

            FiddleHelper.WriteTable("1 - Audit Entries", context.AuditEntries.Where<Customer>(customerA.CustomerID).ToList());

            FiddleHelper.WriteTable("2 - Audit Properties", context.AuditEntries.Where<Customer>(customerA.CustomerID).ToList().SelectMany(x => x.Properties));

        }

    }

    public class Customer

    {

        public int CustomerID { get; set; }

        public string Name { get; set; }

        public string Description { get; set; }

    }

}