public partial class store : IEditableObject
    {
        private Dictionary<string, object> backup = null;

        public void BeginEdit()
        {
            //TODO UNDERSTAND BELOW
            //exit if in Edit mode
            //uncomment if  CancelEdit discards changes since the
            //LAST BeginEdit call is desired action
            //otherwise CancelEdit discards changes since the
            //FIRST BeginEdit call is desired action
            //if (null != props) return;

            //enumerate properties

            PropertyInfo[] properties = (this.GetType()).GetProperties
                (BindingFlags.Public | BindingFlags.Instance);

            backup = new Dictionary<string,object>();

            for (int i = 0; i < properties.Length; i++)
            {
                if (null != properties[i].GetSetMethod())
                {
                    object value = properties[i].GetValue(this, null);
                    backup.Add(properties[i].Name, value);
                }
            }

    }
        public void CancelEdit()
        {
            //check for inappropriate call sequence
            if (null == backup) return;

            //retore old values

            PropertyInfo[] properties = (this.GetType()).GetProperties
                (BindingFlags.Public | BindingFlags.Instance);
            for (int i = 0; i < properties.Length; i++)
            {
                //check if there is a set accessor
                if (null != properties[i].GetSetMethod())
                {
                    object value = backup[properties[i].Name];
                    properties[i].SetValue(this, value, null);
                }
            }
            backup = null;
        }

            public void EndEdit()
            {
                backup = null;
            }
    }
}