ParallelEnumerable.First<'TSource> Method (ParallelQuery<'TSource>)
Returns the first element of a parallel sequence.
Assembly: System.Core (in System.Core.dll)
The sequence to return the first element of.
The first element in the specified sequence.
The type of the elements of source.
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.
source contains no elements.
If the query is not ordered, then the first element is non-deterministic. For more information, see Order Preservation in PLINQ.
Available since 8
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Available since 8.1