TryGetLast< TSource >() [1/2]

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

inlinestaticprivate

Definition at line 5282 of file Enumerable.cs.

    {
        if (source == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.source);
        }
        if (predicate == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.predicate);
        }
        if (source is OrderedEnumerable<TSource> orderedEnumerable)
        {
            return orderedEnumerable.TryGetLast(predicate, out found);
        }
        if (source is IList<TSource> list)
        {
            for (int num = list.Count - 1; num >= 0; num--)
            {
                TSource val = list[num];
                if (predicate(val))
                {
                    found = true;
                    return val;
                }
            }
        }
        else
        {
            using IEnumerator<TSource> enumerator = source.GetEnumerator();
            while (enumerator.MoveNext())
            {
                TSource val2 = enumerator.Current;
                if (!predicate(val2))
                {
                    continue;
                }
                while (enumerator.MoveNext())
                {
                    TSource current = enumerator.Current;
                    if (predicate(current))
                    {
                        val2 = current;
                    }
                }
                found = true;
                return val2;
            }
        }
        found = false;
        return default(TSource);
    }

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