TryGetFirst< TSource >() [2/2]

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

inlinestaticprivate

Definition at line 4885 of file Enumerable.cs.

    {
        if (source == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.source);
        }
        if (source is IPartition<TSource> partition)
        {
            return partition.TryGetFirst(out found);
        }
        if (source is IList<TSource> list)
        {
            if (list.Count > 0)
            {
                found = true;
                return list[0];
            }
        }
        else
        {
            using IEnumerator<TSource> enumerator = source.GetEnumerator();
            if (enumerator.MoveNext())
            {
                found = true;
                return enumerator.Current;
            }
        }
        found = false;
        return default(TSource);
    }

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