// 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 DbSet<AuditEntryProperty> AuditEntryProperty { get; set; }

    }

    public static void Main()

    {

        using (var context = new EntityContext())

        {

            context.Customers.Add(new Customer() { 

                Name = "Customer_A", Description = "Description", 

                                                  Customers = new List<Customer>() {

                                                      new Customer() { Name = "Customer_B", Description = "Description"},new Customer() { Name = "Customer_C", Description = "Description"} 

                                                  }});

            // Save changes with Audit Enabled

            context.SaveChanges();

            // Display Audit Trail

            FiddleHelper.WriteTable("Entity Framework - RelationName from AuditEntryProperty", context.AuditEntryProperty.Where(x => x.RelationName != null).Select(x => x.RelationName).ToList());

        }

    }

    public class Customer

    {

        public int CustomerID { get; set; }

        public string Name { get; set; }

        public string Description { get; set; }

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

    }

}