ParallelEnumerable.Count Method

Definition

Returns the number of elements in a parallel sequence.

Overloads

Count<TSource>(ParallelQuery<TSource>)

Returns the number of elements in a parallel sequence.

Count<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>)

Returns a number that represents how many elements in the specified parallel sequence satisfy a condition.

Count<TSource>(ParallelQuery<TSource>)

Source:
ParallelEnumerable.cs
Source:
ParallelEnumerable.cs
Source:
ParallelEnumerable.cs

Returns the number of elements in a parallel sequence.

C#
public static int Count<TSource>(this System.Linq.ParallelQuery<TSource> source);

Type Parameters

TSource

The type of the elements of source.

Parameters

source
ParallelQuery<TSource>

A sequence that contains elements to be counted.

Returns

The number of elements in the input sequence.

Exceptions

source is a null reference (Nothing in Visual Basic).

The number of elements in source is larger than Int32.MaxValue. (In this case the InnerException is OverflowException) -or- One or more exceptions occurred during the evaluation of the query.

See also

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 2.0, 2.1
UWP 10.0

Count<TSource>(ParallelQuery<TSource>, Func<TSource,Boolean>)

Source:
ParallelEnumerable.cs
Source:
ParallelEnumerable.cs
Source:
ParallelEnumerable.cs

Returns a number that represents how many elements in the specified parallel sequence satisfy a condition.

C#
public static int Count<TSource>(this System.Linq.ParallelQuery<TSource> source, Func<TSource,bool> predicate);

Type Parameters

TSource

The type of the elements of source.

Parameters

source
ParallelQuery<TSource>

A sequence that contains elements to be counted.

predicate
Func<TSource,Boolean>

A function to test each element for a condition.

Returns

A number that represents how many elements in the sequence satisfy the condition in the predicate function.

Exceptions

source or predicate is a null reference (Nothing in Visual Basic).

The number of elements in source is larger than Int32.MaxValue. (In this case the InnerException is OverflowException) -or- One or more exceptions occurred during the evaluation of the query.

See also

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 2.0, 2.1
UWP 10.0