ParallelEnumerable.SingleOrDefault Method
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Returns the only element of a parallel 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.
| SingleOrDefault<TSource>(ParallelQuery<TSource>) |
Returns the only element of a parallel 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. |
| SingleOrDefault<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>) |
Returns the only element of a parallel sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition. |
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
Returns the only element of a parallel 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.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static TSource SingleOrDefault(System::Linq::ParallelQuery<TSource> ^ source);public static TSource SingleOrDefault<TSource>(this System.Linq.ParallelQuery<TSource> source);public static TSource? SingleOrDefault<TSource>(this System.Linq.ParallelQuery<TSource> source);static member SingleOrDefault : System.Linq.ParallelQuery<'Source> -> 'Source<Extension()>
Public Function SingleOrDefault(Of TSource) (source As ParallelQuery(Of TSource)) As TSourceType Parameters
- TSource
The type of the elements of source.
Parameters
- source
- ParallelQuery<TSource>
The sequence to return the single element of.
Returns
The single element of the input sequence, or default() if the sequence contains no elements.
Exceptions
The query was canceled with the token passed in through WithCancellation<TSource>(ParallelQuery<TSource>, CancellationToken).
source is a null reference (Nothing in Visual Basic).
source has more than one element.
One or more exceptions occurred during the evaluation of the query.
See also
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
| UWP | 10.0 |
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
- Source:
- ParallelEnumerable.cs
Returns the only element of a parallel sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition.
public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
static TSource SingleOrDefault(System::Linq::ParallelQuery<TSource> ^ source, Func<TSource, bool> ^ predicate);public static TSource SingleOrDefault<TSource>(this System.Linq.ParallelQuery<TSource> source, Func<TSource,bool> predicate);public static TSource? SingleOrDefault<TSource>(this System.Linq.ParallelQuery<TSource> source, Func<TSource,bool> predicate);static member SingleOrDefault : System.Linq.ParallelQuery<'Source> * Func<'Source, bool> -> 'Source<Extension()>
Public Function SingleOrDefault(Of TSource) (source As ParallelQuery(Of TSource), predicate As Func(Of TSource, Boolean)) As TSourceType Parameters
- TSource
The type of the elements of source.
Parameters
- source
- ParallelQuery<TSource>
The sequence to return the single element of.
Returns
The single element of the input sequence that satisfies the condition, or default() if no such element is found.
Exceptions
The query was canceled with the token passed in through WithCancellation<TSource>(ParallelQuery<TSource>, CancellationToken).
source or predicate is a null reference (Nothing in Visual Basic).
One or more exceptions occurred during the evaluation of the query.
source is empty or multiple elements are returned.
See also
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
| UWP | 10.0 |
.NET feedback
.NET is an open source project. Select a link to provide feedback: