请问一下现在我的任务是编写这个函数HdisHelper.CreateSummary，功能是选择是本院开始还是开始的对象

var hdDate = string.Empty;
                    if (dto.HDStartDate.HasValue && dto.HDStartDate.Value > DateTime.MinValue)
                        hdDate = string.Format("开始（{0}）", dto.HDStartDate.Value.ToString("yyyy-MM-dd"));
                    var localHDDate = string.Empty;
                    if (dto.LocalHDStartDate.HasValue && dto.LocalHDStartDate.Value > DateTime.MinValue)
                        localHDDate = string.Format("本院开始（{0}）", dto.LocalHDStartDate.Value.ToString("yyyy-MM-dd"));
                    info.InfoViewDto.HDDate = HdisHelper.CreateSummary("、", hdDate, localHDDate);