TryGetLast< TSource >() [2/2]

static TSource System.Linq.Enumerable.TryGetLast< TSource > ( this IEnumerable< TSource > source, out bool found )

inlinestaticprivate

Definition at line 5245 of file Enumerable.cs.

    {
        if (source == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.source);
        }
        if (source is IPartition<TSource> partition)
        {
            return partition.TryGetLast(out found);
        }
        if (source is IList<TSource> { Count: var count } list)
        {
            if (count > 0)
            {
                found = true;
                return list[count - 1];
            }
        }
        else
        {
            using IEnumerator<TSource> enumerator = source.GetEnumerator();
            if (enumerator.MoveNext())
            {
                TSource current;
                do
                {
                    current = enumerator.Current;
                }
                while (enumerator.MoveNext());
                found = true;
                return current;
            }
        }
        found = false;
        return default(TSource);
    }

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