ParallelEnumerable::Single<TSource> Method (ParallelQuery<TSource>)
Returns the only element of a parallel sequence, and throws an exception if there is not exactly one element in the sequence.
Assembly: System.Core (in System.Core.dll)
[ExtensionAttribute] public: generic<typename TSource> static TSource Single( ParallelQuery<TSource>^ source )
The type of the elements of source.
- Type: System.Linq::ParallelQuery<>
The sequence to return the single element of.
The single element of the input sequence.
Usage NoteIn Visual Basic and C#, you can call this method as an instance method on any object of type ParallelQuery<>. 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).
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.