Model Class: D_Coursedescription.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using SnapObjects.Data;
using DWNet.Data;
using Newtonsoft.Json;

namespace Appeon.ApiDoc.Models
{
    [DataWindow("d_coursedescription", DwStyle.Grid)]
    [Table("CourseDescription", Schema = "dbo")]
    #region DwSelectAttribute  
    [DwSelect("PBSELECT( VERSION(400) TABLE(NAME=\"CourseDescription\" ) @(_COLUMNS_PLACEHOLDER_) )")]
    #endregion
    [UpdateWhereStrategy(UpdateWhereStrategy.KeyAndConcurrencyCheckColumns)]
    [DwKeyModificationStrategy(UpdateSqlStrategy.DeleteThenInsert)]
    public class D_Coursedescription
    {
        [Key]
        [DwColumn("CourseDescription", "CourseID")]
        public int Courseid { get; set; }

        [ConcurrencyCheck]
        [DwColumn("CourseDescription", "Description")]
        public string Description { get; set; }

        [ConcurrencyCheck]
        [DwColumn("CourseDescription", "ModifiedDate")]
        public DateTime? Modifieddate { get; set; }

        [ConcurrencyCheck]
        [SqlDefaultValue("(newid())")]
        [DwColumn("CourseDescription", "rowguid")]
        public Guid Rowguid { get; set; }

        [ConcurrencyCheck]
        [DwColumn("CourseDescription", "Valid")]
        public bool? Valid { get; set; }

        [ConcurrencyCheck]
        [DwColumn("CourseDescription", "InputDate")]
        public DateTime? Inputdate { get; set; }

        [ConcurrencyCheck]
        [DwColumn("CourseDescription", "InputTime")]
        public TimeSpan? Inputtime { get; set; }

    }

}