Model Class: D_Department_With_Report.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;
using System.Collections;

namespace Appeon.ApiDoc.Models
{
    [DataWindow("d_department_with_report", DwStyle.Default)]
    [Table("Department")]
    #region DwSelectAttribute  
    [DwSelect("PBSELECT( VERSION(400) TABLE(NAME=\"Department\" ) @(_COLUMNS_PLACEHOLDER_) )")]
    #endregion
    [DwSort("departmentid A")]
    [DwKeyModificationStrategy(UpdateSqlStrategy.DeleteThenInsert)]
    [UpdateWhereStrategy(UpdateWhereStrategy.KeyAndConcurrencyCheckColumns)]
    public class D_Department_With_Report
    {
        [Key]
        [DwColumn("Department", "DepartmentID")]
        public int Departmentid { get; set; }

        [ConcurrencyCheck]
        [StringLength(50)]
        [DwColumn("Department", "Name")]
        public string Name { get; set; }

        [JsonIgnore]
        [DwReport(typeof(D_Course_With_Param), ParamValues = "departmentid")]
        public IList<D_Course_With_Param> Dw_1 { get; set; }

    }

}