public void ValidCiticenDuplicate()
{
foreach (ExamFileDetail detail in ExamFileDetails)
{
IEnumerable <ExamFileDetail> ExamDetails = this.ExamFileDetails.Where(a => a.ID_CARD_NO == detail.ID_CARD_NO);
if (ExamDetails.Count() > 1)
{
//this.DuplicateCitizen();
foreach (ExamFileDetail Exam in ExamDetails)
{
Exam.DuplicateCitizen();
}
}
}
}