‫مسطح سازی رابطه‌های EF با Express Mapper

//code to set up the mapping 
ExpressMapper.Mapper.Register<Father, FlattenDto>().Flatten();
ExpressMapper.Mapper.Compile(CompilationTypes.Source);
//code to execute the EF command and get the data
var flattened = dbContext.Fathers.Project<Father, FlattenDto>().ToList();