How to know if an IEnumerable<ValueType> is empty, without counting all?

Question

Without counting all the elements in an IEnumerables<T> collection of struct elements, what is the best way to detect if it is empty?

For example, on class elements I would normally test with first or default:

myEnumerableReferenceTypeElements.FirstOrDefault() == null

because null is not normally a valid value in collections being iterated.

However, in the case of value types where all values must be in a predefined range, the default value (e.g. int default of 0) is also a viable item in the collection.

myValueTypeInt32Elements.FirstOrDefault() == 0   // can't tell if empty for sure

Answer 1

Try using .Any()

bool isEmpty = !myEnumerable.Any();

From MSDN

Determines whether a sequence contains any elements.