ParallelEnumerable.FirstOrDefault<TSource> Method (ParallelQuery<TSource>, Func<TSource, Boolean>)
Returns the first element of the parallel sequence that satisfies a condition or a default value if no such element is found.
Assembly: System.Core (in System.Core.dll)
public static TSource FirstOrDefault<TSource>( this ParallelQuery<TSource> source, Func<TSource, bool> predicate )
The sequence to return an element from.
default(TSource) if source is empty or if no element passes the test specified by predicate; otherwise, the first element in source that passes the test specified by predicate.
The type of the elements of source.
If the query is not ordered, then the first element is non-deterministic. For more information, see Order Preservation in PLINQ.
Available since 4.5
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Available since 8.1