ParallelEnumerable.First<TSource> Method (ParallelQuery<TSource>, Func<TSource, Boolean>)
Returns the first element in a parallel sequence that satisfies a specified condition.
Assembly: System.Core (in System.Core.dll)
public static TSource First<TSource>( this ParallelQuery<TSource> source, Func<TSource, bool> predicate )
The sequence to return an element from.
The first element in the sequence that passes the test in the specified predicate function.
The type of the elements of source.
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 in source satisfies the condition in predicate.
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