EF6 Database.SqlQuery返回多个结果集

Question

我已按照以下链接从我的存储过程中获取多个结果集： Returning multiple resultsets with EntityFramework repository

以下是我的Repository类代码：

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Data.Entity;
//using System.Data.Entity.Core.Objects;
using System.Data.Entity.Infrastructure;
using System.Data.SqlClient;
using System.Linq;
public class AccountRepository:DbContext, IAccountRepository
    {        
        public AccountRepository(string inEnvironment) : base(inEnvironment)
        {
            Database.SetInitializer<AccountRepository>(null);
        }


        public AccountDetailsTemplate GetAccountSummary(long AccountId,int InstanceID)
        {

            var cmd = this.Database.Connection.CreateCommand();
            cmd.CommandType= CommandType.StoredProcedure;
            cmd.CommandText= "[dbo].[GetAccountDetail_SummaryByInstanceID]";

            DbParameter paramAccountId = cmd.CreateParameter();
            paramAccountId.ParameterName = "@AccountId";
            paramAccountId.DbType = DbType.Int64;
            paramAccountId.Direction = ParameterDirection.Input;
            paramAccountId.Value = AccountId;

            cmd.Parameters.Add(paramAccountId);

            DbParameter paramInstanceID = cmd.CreateParameter();
            paramInstanceID.ParameterName = "@InstanceID";
            paramInstanceID.DbType = DbType.Int32;
            paramInstanceID.Direction = ParameterDirection.Input;
            paramInstanceID.Value = InstanceID;

            cmd.Parameters.Add(paramInstanceID);


            try
            {
                this.Database.Connection.Open();
                var reader = cmd.ExecuteReader();

                //Read AccountDetails
                var accountDetails = ((IObjectContextAdapter)this.Database)
                .ObjectContext
                .Translate<AccountDetails>(reader).FirstOrDefault();

                //Read AccountSummary
                reader.NextResult();
                var accountSummary= ((IObjectContextAdapter)this.Database)
                .ObjectContext
                .Translate<AccountSummary>(reader).FirstOrDefault();

                AccountDetailsTemplate acctDetailsTemplate = new AccountDetailsTemplate();
                acctDetailsTemplate.acctDetails = accountDetails;
                acctDetailsTemplate.acctSummary = accountSummary;

                return acctDetailsTemplate;
            }
            finally
            {
                this.Database.Connection.Close();
            }


        }
    }

但是在执行代码时，我在以下行中收到错误：

//Read AccountDetails
                var accountDetails = ((IObjectContextAdapter)db)
                .ObjectContext
                .Translate<AccountDetails>(reader).FirstOrDefault();

我收到以下错误： 无法转换类型＆System; System.Data.Entity.Database＆＃39;输入＆＃39; System.Data.Entity.Infrastructure.IObjectContextAdapter＆＃39;。＆＃39;

实体AccountDetails和AccountSummary不在我的DBContext类中。这是我收到此错误的原因吗？请帮我解决这个错误。