Not getting credit

Question

I answered the question in How to count specific letterr in a string? but did not get credit for it.

That is very frustrating for me. Anyone capable of programming would understand my answer. I really think it does not help people to do everything for them so that they don't have to do any thinking. I don't mind doing other people's work if I get paid for it but I am not likely to get anything significant here. I also answered the question in Prolem in DataGridView using c# but did not get credit for that either.