TryGetSingle< TSource >() [2/2]

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

inlinestaticprivate

Definition at line 7563 of file Enumerable.cs.

    {
        if (source == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.source);
        }
        if (source is IList<TSource> { Count: var count } list)
        {
            switch (count)
            {
            case 0:
                found = false;
                return default(TSource);
            case 1:
                found = true;
                return list[0];
            }
        }
        else
        {
            using IEnumerator<TSource> enumerator = source.GetEnumerator();
            if (!enumerator.MoveNext())
            {
                found = false;
                return default(TSource);
            }
            TSource current = enumerator.Current;
            if (!enumerator.MoveNext())
            {
                found = true;
                return current;
            }
        }
        found = false;
        ThrowHelper.ThrowMoreThanOneElementException();
        return default(TSource);
    }

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