ParallelEnumerable.Single ParallelEnumerable.Single ParallelEnumerable.Single ParallelEnumerable.Single Method

Definition

Returns the only element of a parallel sequence, and throws an exception if there is not exactly one element in the sequence.

Overloads

Single<TSource>(ParallelQuery<TSource>) Single<TSource>(ParallelQuery<TSource>) Single<TSource>(ParallelQuery<TSource>) Single<TSource>(ParallelQuery<TSource>)

Returns the only element of a parallel sequence, and throws an exception if there is not exactly one element in the sequence.

Single<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>) Single<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>) Single<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>) Single<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>)

Returns the only element of a parallel sequence that satisfies a specified condition, and throws an exception if more than one such element exists.

Single<TSource>(ParallelQuery<TSource>) Single<TSource>(ParallelQuery<TSource>) Single<TSource>(ParallelQuery<TSource>) Single<TSource>(ParallelQuery<TSource>)

Returns the only element of a parallel sequence, and throws an exception if there is not exactly one element in the sequence.

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static TSource Single(System::Linq::ParallelQuery<TSource> ^ source);
public static TSource Single<TSource> (this System.Linq.ParallelQuery<TSource> source);
static member Single : System.Linq.ParallelQuery<'Source> -> 'Source
<Extension()>
Public Function Single(Of TSource) (source As ParallelQuery(Of TSource)) As TSource

Type Parameters

TSource

The type of the elements of source.

Parameters

Returns

TSource TSource TSource TSource

The single element of the input sequence.

Exceptions

The query was canceled with the token passed in through WithCancellation.

source is a null reference (Nothing in Visual Basic).

One or more exceptions occurred during the evaluation of the query.

The input sequence contains more than one element. -or- The input sequence is empty.

See also

Single<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>) Single<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>) Single<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>) Single<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>)

Returns the only element of a parallel sequence that satisfies a specified condition, and throws an exception if more than one such element exists.

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static TSource Single(System::Linq::ParallelQuery<TSource> ^ source, Func<TSource, bool> ^ predicate);
public static TSource Single<TSource> (this System.Linq.ParallelQuery<TSource> source, Func<TSource,bool> predicate);
static member Single : System.Linq.ParallelQuery<'Source> * Func<'Source, bool> -> 'Source
<Extension()>
Public Function Single(Of TSource) (source As ParallelQuery(Of TSource), predicate As Func(Of TSource, Boolean)) As TSource

Type Parameters

TSource

The type of the elements of source.

Parameters

predicate
Func<TSource,Boolean>

A function to test an element for a condition.

Returns

TSource TSource TSource TSource

The single element of the input sequence that satisfies a condition.

Exceptions

The query was canceled with the token passed in through WithCancellation.

source or predicate is a null reference (Nothing in Visual Basic).

One or more exceptions occurred during the evaluation of the query.

No element satisfies the condition in predicate. -or- More than one element satisfies the condition in predicate.

See also

Applies to