var liste= Db.ModelA.Where(x => x.A == id).Select(ex =>
new ModelB
{
GroupId = ex.GroupId,
ExamId = ex.ExamId,
Publish = ex.Publish,
CourseName = ex.Group.Course.Name,
GroupName = ex.Group.Name,
ExamName = ex.Name,
}
).FirstOrDefault();
new ModelB
{
GroupId = ex.GroupId,
ExamId = ex.ExamId,
Publish = ex.Publish,
CourseName = ex.Group.Course.Name,
GroupName = ex.Group.Name,
ExamName = ex.Name,
}
).FirstOrDefault();