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

If you only want the first element, use FirstOrDefault instead.

Basically, here are the options in terms of valid results (i.e. where you don't want to throw) and what to use:

• Exactly one: Single
• One or zero: SingleOrDefault
• One or more: First
• Zero or more: FirstOrDefault

(ElementAt and ElementAtOrDefault, Last and LastOrDefault are also available.)