CLR类型到EDM类型的映射不明确，因为多个CLR类型与EDM类型“ BN”匹配

Question

我在客户端有一个asp.net mvc Web应用程序，在服务器端有一个OData API。在此客户端应用程序中，我将“ OData客户端”添加到项目中以使用linq查询来调用我的OData API（我可以在vs2017中添加“ OData v4客户端代码生成器”的扩展名后添加OData客户端）。在这个项目中，我有以下查询来调用我的服务器：

string serviceUri = "http://192.168.1.2:1234";
var container = new APIs.Default.Container(new Uri(serviceUri));

var SingleCustomer = container.Customers.Where(n => n.NationalCode == body.NationalCode).Select(x => x).FirstOrDefault();

此后，我用来自“ SingleCustomer”的数据填充ViewModel类，如下所示：

 CustomerViewModel customerViewModel = new CustomerViewModel()
   {
     Address = SingleCustomer.Address,
     Adr = SingleCustomer.Adr,
     AgentCodeMelli = SingleCustomer.AgentCodeMelli,
     BirthDay = SingleCustomer.BirthDay,
     BirthMonth = SingleCustomer.BirthMonth,
     BirthPlace = SingleCustomer.BirthPlace,
     BirthYear = SingleCustomer.BirthYear,
     BusinessGroup = SingleCustomer.BusinessGroup,
     CIIValidationStatus = SingleCustomer.CIIValidationStatus
             }

之后，我将ViewModel类中的数据添加到本地数据库中，如下所示：

    SeeMiddleEntities db = new SeeMiddleEntities();

                    APIs.Models.Customer customer = new APIs.Models.Customer()
                                {
                                    Address = SingleCustomer.Address,
                                    Adr = SingleCustomer.Adr,
                                    AgentCodeMelli = SingleCustomer.AgentCodeMelli,
                                    BirthDay = SingleCustomer.BirthDay,
                                    BirthMonth = SingleCustomer.BirthMonth,
                                    BirthPlace = SingleCustomer.BirthPlace,
                                    BirthYear = SingleCustomer.BirthYear,
                                    BusinessGroup = SingleCustomer.BusinessGroup,
                                    CIIValidationStatus = SingleCustomer.CIIValidationStatus
                                 };

                    if (SingleCustomer != null)
                                {
                                    try
                                    {
                                        db.Customer.Add(customer);
                                        db.SaveChanges();
                                    }
                                    catch (Exception e)
                                    {
                                        Error res = new Error
                                        {
                                            _Error = "The customer is not inserted",
                                            Code = 417,
                                        };
                                        return ResponseMessage(Request.CreateResponse<Error>(HttpStatusCode.ExpectationFailed, res));
                                    }
                     List<BN> listBns = new List<BN>();
                                var CustomerId = SingleCustomer.Id;
                                var BN = container.BNs.Where(n => n.BimeGozarCustomerId == CustomerId && n.ReshteIsLife == true).Select(x => x).ToList();
                                foreach (var items in BN)
                                {
                                    BN bn = new BN()
                                    {
                                        Id = items.Id,
                                        AgentLocationBeginDate = items.AgentLocationBeginDate,
                                        AgentLocationBranchCode = items.AgentLocationBranchCode,
                                        AgentLocationBranchDisplayName = items.AgentLocationBranchDisplayName,
                                        AgentLocationCityName = items.AgentLocationCityName,
                                        AgentLocationCode = items.AgentLocationCode,
                                        AgentLocationDegree = items.AgentLocationDegree,
                                        AgentLocationDisplayName = items.AgentLocationDisplayName,
                                        AgentLocationID = items.AgentLocationID,
                                        AgentLocationKindName = items.AgentLocationKindName,
                                        AgentLocationMapCode = items.AgentLocationMapCode,
                                        AgentLocationPersonKindName = items.AgentLocationPersonKindName,
                                        AgentLocationProvinceName = items.AgentLocationProvinceName
                                    };
                                    listBns.Add(bn);
                                }
        if (BN.Count != 0)
                        {
                            try
                            {
                                foreach (var Bn in listBns)
                                {
                                    db.BN.Add(Bn);

                       db.SaveChanges();
                                }

                            }
                            catch (Exception e)
                            {
                                Error res = new Error
                                {
                                    _Error = "There is not",
                                    Code = 417,
                                };
                                return ResponseMessage(Request.CreateResponse<Error>(HttpStatusCode.ExpectationFailed, res));
                            }
                        }

我进行了搜索，有人说这个问题可以使用Code First来解决，也可以通过DotNet Core来解决，但是我对此一无所知，没有时间去学习。如何使用Asp.Net和Entity Framework 6.0解决此问题？??????