public void InvalidRead2()
 {
     Read r = new Read { QuestionId = 3 };
     db.Read.Add(r);
     db.SaveChanges();
 }
 public void ValidRead()
 {
     Read r = new Read { UserId = 3, QuestionId = 5 };
     db.Read.Add(r);
     db.SaveChanges();
 }
 public void InvalidRead1()
 {
     Read r = new Read { UserId = 3 };
     db.Read.Add(r);
     db.SaveChanges();
 }