A simple Entity

using NBusiness.Templates;

family Business 
{ 
     entity Simple as EntityBase
     { 
          field auto id int Sid;
          field string Data;
     } 
}

using System;
using System.Data;
using NBusiness.Data;

namespace Business
{
    public partial class Simple : EntityBase
    {
        private int _Sid;
        public int Sid { /* ... */ }

        private string _Data;
        public string Data { /* ... */ }

        //Various data access factories and rule initialization methods.
    }
}

[Test]
private void SimpleEntityExample()
{
    Simple s = Simple.CreateNew();
    s.Data = "a simple example";
    s.Save();

    Assert.IsTrue(s.Sid > 0);        //The id is auto assigned after the first time it is saved.
    Assert.IsFalse(s.IsNew);
}