ICollection - Get single value

Question

What is the best way to get a value from a ICollection? We know the Collection is empty apart from that.

Answer 1

If you know your collection has only one item, should only ever have one item, you can use the Linq extension method Single().

This converts a ICollection into a T object containing the single item of that collection. If the length of the collection is 0, or more than one, this will throw an InvalidOperationException.