c# - Why would I use Enumerable.ElementAt() versus the [] operator?

Question

This seems like a silly question, but I haven't found the answer, so here it is. :)

In both cases, you will get an "out-of-range" exception if you fail to check the bounds of your collection. Is this just coding style preference?

And in case someone needs an example:

List<byte> myList = new List<byte>(){0x01, 0x02, 0x03};
byte testByte = myList.ElementAt(2);

versus

byte testByte = myList[2];

Answer 1

Because Enumerable is more generic, and a collection represented by enumerable may not have an indexer.

But, if it does - don't use ElementAt() it's probably not going to be as efficient.