C# 如何将多个SQL关系映射到c对象

我正在开发一个C WPF桌面应用程序，在这里我需要定期读/写SQL数据库SQL server。现在我想将数据库中的数据映射到C中的对象。我不能使用实体框架，所以我通过Dapper、slapper automapper和存储过程来访问所有数据

作为一个例子，我对这个示例数据库进行了建模

C对象看起来与此类似

public class Manager {

   public string Name { get; set; }
   public string Phone { get; set; }
   public List<Facility> Facilities {get; set;}
} 

public class City {

   public string Name { get; set; }
   public string Description{ get; set; }
   public List<Facility> Facilities {get; set;}
} 

public class Facility {

   public string Name { get; set; }
   public string Description{ get; set; }
} 

现在，我使用Slapper中的下划线符号Dapper从表中查询数据：

const string sql = @"SELECT 
                                    m.Name,
                                    m.Phone,
                                    m.ManagerId,
                                    f.FacilityId As Facility_FacilityId,
                                    f.WorkerCount As Facility_WorkerCount,
                                    f.SquareFoot As Facility_SquareFoot,
                                    f.Description As Facility_Description,
                                    c.CityId AS Facility_City_CityId,
                                    c.Name AS Facility_City_Name,
                                    c.Description AS Facility_City_Description,

                                    from Manager m  
                                    INNER JOIN  dbo.Facility f  ON  m.ManagerId = f.ManagerId
                                    INNER JOIN  dbo.City c  ON  f.CityId = c.CityId";


            using (System.Data.IDbConnection _connection = new System.Data.SqlClient.SqlConnection("Connstrint"))
            {
               var test = _connection.Query<dynamic>(sql);
                Slapper.AutoMapper.Configuration.AddIdentifiers(typeof(Facility), new List<string> { "FacilityId" });
                Slapper.AutoMapper.Configuration.AddIdentifiers(typeof(Manager), new List<string> { "ManagerId" });
                Slapper.AutoMapper.Configuration.AddIdentifiers(typeof(City), new List<string> { "CityId" });



                var testNetwork = (Slapper.AutoMapper.MapDynamic<Manager>(test) as IEnumerable<Manager>).ToList();
                System.Diagnostics.Debugger.Break();
            }

我知道贴图无法完全工作，因为设备无法进入对象中的城市。我应该画两张地图吗？一次从经理那里下来，然后从城市？还是我应该使用另一种设计模式