| FallbackIfEmpty<T>(IEnumerable<T>, T) | Returns the elements of the specified sequence or the specified value in a singleton collection if the sequence is empty. |
| FallbackIfEmpty<T>(IEnumerable<T>, T[]) | Returns the elements of a sequence, but if it is empty then returns an alternate sequence from an array of values. |
| FallbackIfEmpty<T>(IEnumerable<T>, IEnumerable<T>) | Returns the elements of a sequence, but if it is empty then returns an alternate sequence of values. |
| FallbackIfEmpty<T>(IEnumerable<T>, T, T) | Returns the elements of a sequence, but if it is empty then returns an alternate sequence of values. |
| FallbackIfEmpty<T>(IEnumerable<T>, T, T, T) | Returns the elements of a sequence, but if it is empty then returns an alternate sequence of values. |
| FallbackIfEmpty<T>(IEnumerable<T>, T, T, T, T) | Returns the elements of a sequence, but if it is empty then returns an alternate sequence of values. |