MoreEnumerable.FallbackIfEmpty(T) Method (IEnumerable(T), T[])

MoreEnumerableFallbackIfEmptyT Method (IEnumerableT, T)

Returns the elements of a sequence, but if it is empty then returns an altenate sequence from an array of values.

Namespace: MoreLinq
Assembly: MoreLinq (in MoreLinq.dll) Version: 2.0.0

Syntax

public static IEnumerable<T> FallbackIfEmpty<T>(
	this IEnumerable<T> source,
	params T[] fallback
)

<ExtensionAttribute>
Public Shared Function FallbackIfEmpty(Of T) ( 
	source As IEnumerable(Of T),
	ParamArray fallback As T()
) As IEnumerable(Of T)

public:
[ExtensionAttribute]
generic<typename T>
static IEnumerable<T>^ FallbackIfEmpty(
	IEnumerable<T>^ source, 
	... array<T>^ fallback
)

[<ExtensionAttribute>]
static member FallbackIfEmpty : 
        source : IEnumerable<'T> * 
        fallback : 'T[] -> IEnumerable<'T>

source: Type: System.Collections.GenericIEnumerableT
The source sequence.
fallback: Type: T
The array that is returned as the alternate sequence if source is empty.

Type: IEnumerableT
An IEnumerableT that containing fallback values if source is empty; otherwise, source.

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerableT. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).