Ошибка после выноса класса в отдельный файл - C#

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Формулировка задачи:

Вынес данный класс в отдельный файл, не понимаю почему возникает ошибка: Error 1 The type or namespace name 'RailCrossings' could not be found (are you missing a using directive or an assembly reference?) 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Data.OracleClient;
using System.Data;
 
namespace Service
{

    public class RailCrossings
    {
        public int key;
        public string NAME;
        public int subdiv_gibdd;
        public int odh;
        public int category;
        public int USETYPE;
        public int OWNER;
        public int TRACK_DEPT;
        public int KM_POINT;
        public string STATION;
        public string PIQUET;
        public string PIQUET_PART;
        public int DUTY;
        public int NUM_SHIFTS;
        public int SHIFT_DURATION;
        public int NUM_DUTY;
        public string SERVICE;
        public int RAILCROSS_TYPE;
        public int BARRIER_STATE;
        public int SIGNAL_TYPE;
        public string PROTECT_FASC;
        public string CROSS_ROAD_NAME;
        public int HIGHWAY_CAT;
        public int VIEW_R_ODD;
        public int VIEW_R_EVEN;
        public int VIEW_L_ODD;
        public int VIEW_L_EVEN;
        public int VIEW_MID_TRAIN_ODD;
        public int VIEW_MID_TRAIN_EVEN;
        public int NUM_DAY_TRAINS;
        public int NUM_DAY_CARS;
        public int NUM_ROUTE_BUS;
        public int NUM_ROUTE_TRAM;
        public int NUM_ROUTE_TBUS;
        public int NUM_LINES_MAIN;
        public int NUM_LINES_STATION;
        public int NUM_LINES_OTHER;
        public int SPEEDMAX_FREIGHT_EVEN;
        public int SPEEDMAX_FREIGHT_ODD;
        public int SPEEDMAX_PASS_EVEN;
        public int SPEEDMAX_PASS_ODD;
 
        public int LOCATION;
        public string OPER_ORDER_NUM;
        public DateTime OPER_ORDER_DT;
        public DateTime DT_CARD_CREATE;
        public string POST_CARD_CREATE;
        public string NAME_CARD_CREATE;
        public int ADRESS;
        public int LATITUDE;
        public int LONGITUDE;
 
    }
}
 
основной файл где  используется данный класс:
 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Data.OracleClient;
using System.Data;
 
namespace Service
{
    /// <summary>
    /// Summary description for test
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
    // [System.Web.Script.Services.ScriptService]
    public class ser : System.Web.Services.WebService
    {
        [WebMethod]
        public Point[] GetDictMapLayers(string KEY)
        {
 
            string sql = "select 'select s.' || POINT_TABLE_PK || ', to_char(s.' || POINT_TABLE_POINT || '.get_wkt()) from ' || POINT_TABLE || ' s' from MAP_LAYERS where key = " + KEY;
            sql = Convert.ToString(MB.GetSingleValue(sql));
            DataTable Plaсe = MB.GetData(sql);
 
            Point[] elems = new Point[Plaсe.Rows.Count];
            for (int i = 0; i < Plaсe.Rows.Count; i++)
            {
                Point three = new Point();
                three.KEY = Convert.ToInt32(Plaсe.Rows[i][0]);
                three.points = Convert.ToString(Plaсe.Rows[i][1]);
                elems[i] = three;
            }
            return elems;
        }
 
        [WebMethod]
        public RailCrossings[] GetDictRailCrossings()
        {
            string SQL
                = "select KEY, NAME, SUBDIV_GIBDD, (select WM_CONCAT(vlu) from T2073A52 where RFR = r.key) as ODH, " +
                    "    OWNER, CATEGORY, USETYPE, TRACK_DEPT, KM_POINT, STATION, PIQUET, PIQUET_PART, DUTY, NUM_SHIFTS, SHIFT_DURATION, NUM_DUTY, SERVICE, RAILCROSS_TYPE, BARRIER_STATE, " +
                    "    SIGNAL_TYPE, PROTECT_FASC, CROSS_ROAD_NAME, HIGHWAY_CAT, VIEW_R_ODD, VIEW_R_EVEN, VIEW_L_ODD, VIEW_L_EVEN, VIEW_MID_TRAIN_ODD, VIEW_MID_TRAIN_EVEN, NUM_DAY_TRAINS, NUM_DAY_CARS, NUM_ROUTE_BUS, " +
                    "    NUM_ROUTE_TRAM, NUM_ROUTE_TBUS, NUM_LINES_MAIN, NUM_LINES_STATION, NUM_LINES_OTHER, SPEEDMAX_FREIGHT_EVEN, SPEEDMAX_FREIGHT_ODD, SPEEDMAX_PASS_EVEN, SPEEDMAX_PASS_ODD, LOCATION, OPER_ORDER_NUM, " +
                    "    OPER_ORDER_DT, DT_CARD_CREATE, POST_CARD_CREATE, NAME_CARD_CREATE, ADRESS, " +
                    "    (select d.FPOINT.SDO_POINT.x from MLR_T2073 d where item_key = key) as LATITUDE, " +
                    "    (select d.FPOINT.SDO_POINT.y from MLR_T2073 d where item_key = key) as LONGITUDE, " +
                    "    (select rtrim(DBMS_XMLGEN.CONVERT(to_char(sys_xmlagg(xmlelement(key, key || ',')).extract('/ROWSET/KEY/text()').getclobval()), 1),',') from t2690 where railcross = r.key) as KEY_OVERHAUL " +
                    "    from t2073 r ";
 
            DataTable d = MB.GetData(SQL);
            if (d.Rows.Count > 0)
            {

                //OracleParameter qryParam = new OracleParameter("T1554", 12);
                //OracleParameter[] qryParams = new OracleParameter[1];
                //qryParams[] = qryParam;
                d = MB.GetData(SQL);
 
                RailCrossings[] information = new RailCrossings[d.Rows.Count];
                for (int i = 0; i < d.Rows.Count; i++)
                {
                    RailCrossings gibdd = new RailCrossings();
                    gibdd.key = d.Rows[i]["key"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["key"]);
                    gibdd.NAME = d.Rows[i]["name"] is DBNull ? "" : Convert.ToString(d.Rows[i]["name"]);
                    gibdd.subdiv_gibdd = d.Rows[i]["subdiv_gibdd"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["subdiv_gibdd"]);
                    gibdd.odh = d.Rows[i]["odh"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["odh"]);
                    gibdd.OWNER = d.Rows[i]["owner"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["owner"]);
                    gibdd.category = d.Rows[i]["category"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["category"]);
                    gibdd.USETYPE = d.Rows[i]["usetype"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["usetype"]);
                    gibdd.TRACK_DEPT = d.Rows[i]["track_dept"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["track_dept"]);
                    gibdd.KM_POINT = d.Rows[i]["KM_POINT"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["KM_POINT"]);
                    gibdd.STATION = Convert.ToString(d.Rows[i]["STATION"]);
                    gibdd.PIQUET = d.Rows[i]["PIQUET"] is DBNull ? "" : Convert.ToString(d.Rows[i]["PIQUET"]);
                    gibdd.PIQUET_PART = d.Rows[i]["PIQUET_PART"] is DBNull ? "" : Convert.ToString(d.Rows[i]["PIQUET_PART"]);
                    gibdd.DUTY = d.Rows[i]["DUTY"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["DUTY"]);
                    gibdd.NUM_SHIFTS = d.Rows[i]["NUM_SHIFTS"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["NUM_SHIFTS"]);
                    gibdd.SHIFT_DURATION = d.Rows[i]["SHIFT_DURATION"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["SHIFT_DURATION"]);
                    gibdd.NUM_DUTY = d.Rows[i]["NUM_DUTY"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["NUM_DUTY"]);
                    gibdd.SERVICE = d.Rows[i]["SERVICE"] is DBNull ? "" : Convert.ToString(d.Rows[i]["SERVICE"]);
                    gibdd.RAILCROSS_TYPE = d.Rows[i]["RAILCROSS_TYPE"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["RAILCROSS_TYPE"]);
                    gibdd.BARRIER_STATE = d.Rows[i]["BARRIER_STATE"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["BARRIER_STATE"]);
                    gibdd.SIGNAL_TYPE = d.Rows[i]["SIGNAL_TYPE"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["SIGNAL_TYPE"]);
                    gibdd.PROTECT_FASC = d.Rows[i]["PROTECT_FASC"] is DBNull ? "" : Convert.ToString(d.Rows[i]["PROTECT_FASC"]);
                    gibdd.CROSS_ROAD_NAME = d.Rows[i]["CROSS_ROAD_NAME"] is DBNull ? "" : Convert.ToString(d.Rows[i]["CROSS_ROAD_NAME"]);
                    gibdd.HIGHWAY_CAT = d.Rows[i]["HIGHWAY_CAT"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["HIGHWAY_CAT"]);
                    gibdd.VIEW_R_ODD = d.Rows[i]["VIEW_R_ODD"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["VIEW_R_ODD"]);
                    gibdd.VIEW_R_EVEN = d.Rows[i]["VIEW_R_EVEN"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["VIEW_R_EVEN"]);
                    gibdd.VIEW_L_ODD = d.Rows[i]["VIEW_L_ODD"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["VIEW_L_ODD"]);
                    gibdd.VIEW_L_EVEN = d.Rows[i]["VIEW_L_EVEN"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["VIEW_L_EVEN"]);
                    gibdd.VIEW_MID_TRAIN_ODD = d.Rows[i]["VIEW_MID_TRAIN_ODD"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["VIEW_MID_TRAIN_ODD"]);
                    gibdd.VIEW_MID_TRAIN_EVEN = d.Rows[i]["VIEW_MID_TRAIN_EVEN"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["VIEW_MID_TRAIN_EVEN"]);
                    gibdd.NUM_DAY_TRAINS = d.Rows[i]["NUM_DAY_TRAINS"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["NUM_DAY_TRAINS"]);
                    gibdd.NUM_DAY_CARS = d.Rows[i]["NUM_DAY_CARS"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["NUM_DAY_CARS"]);
                    gibdd.NUM_ROUTE_BUS = d.Rows[i]["NUM_ROUTE_BUS"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["NUM_ROUTE_BUS"]);
                    gibdd.NUM_ROUTE_TRAM = d.Rows[i]["NUM_ROUTE_TRAM"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["NUM_ROUTE_TRAM"]);
                    gibdd.NUM_ROUTE_TBUS = d.Rows[i]["NUM_ROUTE_TBUS"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["NUM_ROUTE_TBUS"]);
                    gibdd.NUM_LINES_MAIN = d.Rows[i]["NUM_LINES_MAIN"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["NUM_LINES_MAIN"]);
                    gibdd.NUM_LINES_STATION = d.Rows[i]["NUM_LINES_STATION"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["NUM_LINES_STATION"]);
                    gibdd.NUM_LINES_OTHER = d.Rows[i]["NUM_LINES_OTHER"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["NUM_LINES_OTHER"]);
                    gibdd.SPEEDMAX_FREIGHT_EVEN = d.Rows[i]["SPEEDMAX_FREIGHT_EVEN"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["SPEEDMAX_FREIGHT_EVEN"]);
                    gibdd.SPEEDMAX_FREIGHT_ODD = d.Rows[i]["SPEEDMAX_FREIGHT_ODD"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["SPEEDMAX_FREIGHT_ODD"]);
                    gibdd.SPEEDMAX_PASS_EVEN = d.Rows[i]["SPEEDMAX_PASS_EVEN"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["SPEEDMAX_PASS_EVEN"]);
                    gibdd.SPEEDMAX_PASS_ODD = d.Rows[i]["SPEEDMAX_PASS_ODD"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["SPEEDMAX_PASS_ODD"]);
                    gibdd.LOCATION = d.Rows[i]["LOCATION"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["LOCATION"]);
                    gibdd.OPER_ORDER_NUM = d.Rows[i]["OPER_ORDER_NUM"] is DBNull ? "" : Convert.ToString(d.Rows[i]["OPER_ORDER_NUM"]);
                    gibdd.OPER_ORDER_DT = d.Rows[i]["OPER_ORDER_DT"] is DBNull ? DateTime.MinValue : Convert.ToDateTime(d.Rows[i]["OPER_ORDER_DT"]);
                    gibdd.DT_CARD_CREATE = d.Rows[i]["DT_CARD_CREATE"] is DBNull ? DateTime.MinValue : Convert.ToDateTime(d.Rows[i]["DT_CARD_CREATE"]);
                    gibdd.POST_CARD_CREATE = d.Rows[i]["POST_CARD_CREATE"] is DBNull ? "" : Convert.ToString(d.Rows[i]["POST_CARD_CREATE"]);
                    gibdd.NAME_CARD_CREATE = d.Rows[i]["NAME_CARD_CREATE"] is DBNull ? "" : Convert.ToString(d.Rows[i]["NAME_CARD_CREATE"]);
                    gibdd.ADRESS = d.Rows[i]["ADRESS"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["ADRESS"]);
                    gibdd.LATITUDE = d.Rows[i]["LATITUDE"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["LATITUDE"]);
                    gibdd.LONGITUDE = d.Rows[i]["LONGITUDE"] is DBNull ? 0 : Convert.ToInt32(d.Rows[i]["LONGITUDE"]);
                    information[i] = gibdd;
                }
                return information;
            }
            else
            {
                RailCrossings[] ver = new RailCrossings[0];
                return ver;
            }
 
        }

    }

    public class Point
    {
        
        public int KEY;
        public string points;
        
    }

}

Решение задачи: «Ошибка после выноса класса в отдельный файл»

textual
Листинг программы 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Data.OracleClient;
using System.Data;
 
namespace Service
{
 
 
 
    public class RailCrossings
    {
        public int key;
        public string NAME;
      
    }
}

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