Lambda表达式 o=>o.ID

1.

dbMSpeakers = this.GetObjects(new MeetingSpeaker { MeetingSn = meeting.Sn }, " and Type in ('-1','0','1','2','3','5')");

if (dbMSpeakers.All(o => o.DoctorSn != item.DoctorSn))

2.

meeting.MSpeakers.Count(o => !o.IsShowDelete)

3.

if (meeting.MListeners.Any(o => o.HospitalName != meeting.HospitalName))

4.

if (dbTemplateMsgs.FirstOrDefault(o => o.Email == item.Email) == null)

5.

int JZi = meeting.MSpeakers.Count(o => !o.IsShowDelete && o.MSpeakersType.Any(r => r.SpeakerType == SpeakerRoleType.Speaker.GetHashCode()));

 

where、FirstOrDefault、order、GroupBy、Select、Sum、Max、Min、Count、Contains、LastOrDefault、Take