ParallelEnumerable.LongCount<TSource> Method (ParallelQuery<TSource>, Func<TSource, Boolean>)
.NET Framework (current version)
Returns an Int64 that represents how many elements in a parallel sequence satisfy a condition.
Assembly: System.Core (in System.Core.dll)
public static long LongCount<TSource>( this ParallelQuery<TSource> source, Func<TSource, bool> predicate )
Parameters
- source
-
Type:
System.Linq.ParallelQuery<TSource>
A sequence that contains elements to be counted.
- predicate
-
Type:
System.Func<TSource, Boolean>
A function to test each element for a condition.
Return Value
Type: System.Int64A number that represents how many elements in the sequence satisfy the condition in the predicate function.
Type Parameters
- TSource
The type of the elements of source.
| Exception | Condition |
|---|---|
| OperationCanceledException | The query was canceled with the token passed in through WithCancellation. |
| ArgumentNullException | source or predicate is a null reference (Nothing in Visual Basic). |
| AggregateException | The number of elements in source is larger than MaxValue. -or- One or more exceptions occurred during the evaluation of the query. |
| OverflowException | The computed result is greater than MaxValue. |
Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1
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