/// <summary>
/// 获取正在参与学习的学生
/// </summary>
/// <returns></returns>
public ApiModels.Student GetStudyStudent(long studentId)
{
return(AllStudents.Where(m => m.id == studentId).FirstOrDefault());
}
/// <summary>
/// 获取正在参与学习的学生列表
/// </summary>
/// <returns></returns>
public List <ApiModels.Student> GetStudyStudents()
{
return(AllStudents.Where(m => StudentIds.Any(c => m.id == c)).ToList());
}