ParallelEnumerable.Select<TSource, TResult> Method (ParallelQuery<TSource>, Func<TSource, Int32, TResult>)
Projects in parallel each element of a sequence into a new form by incorporating the element's index.
Assembly: System.Core (in System.Core.dll)
public static ParallelQuery<TResult> Select<TSource, TResult>( this ParallelQuery<TSource> source, Func<TSource, int, TResult> selector )
A sequence of values to invoke a transform function on.
Return ValueType: System.Linq.ParallelQuery< >
A sequence whose elements are the result of invoking the transform function on each element of source, based on the index supplied to selector.
The type of the elements of source.
The type of elements resturned by selector.
source or selector is a null reference (Nothing in Visual Basic).
The query was canceled with the token passed in through WithCancellation.
One or more exceptions occurred during the evaluation of the query.
More than MaxValue elements are enumerated by the query. This condition might occur in streaming scenarios.
Available since 8
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Available since 8.1