Any< TSource >() [1/2]

static bool System.Linq.Enumerable.Any< TSource > ( this IEnumerable< TSource > source )

inlinestatic

Definition at line 3613 of file Enumerable.cs.

    {
        if (source == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.source);
        }
        if (source is ICollection<TSource> collection)
        {
            return collection.Count != 0;
        }
        if (source is IIListProvider<TSource> iIListProvider)
        {
            int count = iIListProvider.GetCount(onlyIfCheap: true);
            if (count >= 0)
            {
                return count != 0;
            }
        }
        else if (source is ICollection collection2)
        {
            return collection2.Count != 0;
        }
        using IEnumerator<TSource> enumerator = source.GetEnumerator();
        return enumerator.MoveNext();
    }

References System.collection, System.Linq.count, System.Collections.Generic.Dictionary< TKey, TValue >.GetEnumerator(), System.Linq.source, and System.Linq.ThrowHelper.ThrowArgumentNullException().