SingleOrDefault() throws an exception on more than one element

Question

I\'m getting an exception whenever I fetch like this

Feature f = o.Features.SingleOrDefault(e => e.LinkName == PageLink);

because this can r

Answer 1

Single means that you expect be one element in the sequence. SingleOrDefault means that you expect there to be one or zero elements in the sequence. This should be used when you want know there is one (or zero) and you want it to crash when more than one it returned.

If you are after just one, use First (or FirstOrDefault) as suggested above, but make sure you order the data correctly.