HBM.Dashboard.LoadDirtyRooms C# (CSharp) Method

        private void LoadDirtyRooms()
        {
            DataSet dsDirtyRooms = new RoomDAO().SelectAllDirtyRooms(Master.CurrentCompany.CompanyId);
            dsDirtyRooms.Tables[0].PrimaryKey = new DataColumn[] { dsDirtyRooms.Tables[0].Columns["RoomId"] };
            Session[Constants.SESSION_DIRTYROOMS] = dsDirtyRooms;
            if (dsDirtyRooms.Tables[0].Columns.Contains("CleanedDate") == false)
            {
                dsDirtyRooms.Tables[0].Columns.Add("CleanedDate", Type.GetType("System.DateTime"));
            }
            gvDirtyRooms.DataSource = (DataSet)Session[Constants.SESSION_DIRTYROOMS];
            gvDirtyRooms.DataBind();
        }