Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence.

Namespace: MoreLinq
Assembly: MoreLinq (in MoreLinq.dll) Version: 3.3.1+b77df70598ab84c28cd43dcf74594024b6d575e1

Syntax

C++

Copy

public static T SingleOrDefault<T>(
	this IExtremaEnumerable<T> source
)

<ExtensionAttribute>
Public Shared Function SingleOrDefault(Of T) ( 
	source As IExtremaEnumerable(Of T)
) As T

public:
[ExtensionAttribute]
generic<typename T>
static T SingleOrDefault(
	IExtremaEnumerable<T>^ source
)

[<ExtensionAttribute>]
static member SingleOrDefault : 
        source : IExtremaEnumerable<'T> -> 'T

Parameters

source: Type: MoreLinqIExtremaEnumerableT
The input sequence.

Type Parameters

T: The type of the elements of source.

Return Value

Type: T
The single element of the input sequence, or default value of type T if the sequence contains no elements.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IExtremaEnumerableT. 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).

Reference

MoreEnumerable Class

MoreLinq Namespace

MoreEnumerableAddLanguageSpecificTextSet("LST5BF7F5D8_0?cpp=::|nu=.");SingleOrDefaultAddLanguageSpecificTextSet("LST5BF7F5D8_1?cs=&lt;|vb=(Of |cpp=&lt;|fs=&lt;'|nu=(");TAddLanguageSpecificTextSet("LST5BF7F5D8_2?cs=&gt;|vb=)|cpp=&gt;|fs=&gt;|nu=)"); Method

Parameters

Type Parameters

Return Value

Usage Note

Reference

MoreEnumerableSingleOrDefaultT Method