Writing a custom audit plugin

public interface IAuditable
{
    DateTime CreatedDate { get; set; }
    DateTime ModifiedDate { get; set; }
    string ModifiedByUserId { get; set; }
}
Create a class that implements IPlugin.
public class AuditFeature : IPlugin
{
  public IDbConnectionFactory DbConnectionFactory { get; set; }

  public void Register(IAppHost appHost)
  {
    if (OrmLiteConfig.DialectProvider == null)
    {
      throw new Exception("AuditFeature requires the use of OrmLite and a DialectProvider must be first initialized.");
    }

    OrmLiteConfig.InsertFilter = AuditInsert;
    OrmLiteConfig.UpdateFilter = AuditUpdate;
  }

  private void AuditInsert(IDbCommand command, object rowObj)
  {
    var auditObject = rowObj as IAuditable;
    if (auditObject != null)
    {
      var now = DateTime.UtcNow;
      auditObject.CreatedDate = now;
      auditObject.ModifiedDate = now;
      // Modified by user running the process of the AppPool. Note: only works in Windows.
      auditObject.ModifiedByUserId =System.Security.Principal.WindowsIdentity.GetCurrent().Name;
    }
  }

  private void AuditUpdate(IDbCommand command, object rowObj)
  {
    var auditObject = rowObj as IAuditable;
    if (auditObject != null)
    {
      var now = DateTime.UtcNow;
      auditObject.ModifiedDate = now;
      // Modified by user running the process of the AppPool. Note: only works in Windows.
      auditObject.ModifiedByUserId =System.Security.Principal.WindowsIdentity.GetCurrent().Name;
  }
  }
}

public class ApplicationHost : AppHostBase
{
  public ApplicationHost(): base("Reidson Messenger", typeof(MessageRequest).Assembly)
  { }

  public override void Configure(Container container)
  {
    Plugins.Add(new AuditFeature());
  }
}
Add the IAuditable interface to a model class, like the Message class:
public class Message : IAuditable
{
  //...
  public DateTime CreatedDate { get;set; }
  public DateTime ModfiedDate { get;set; }
  public string ModfiedByUserId { get;set; }
}