# ParallelEnumerable Class

**.NET Framework 4.5**

Provides a set of methods for querying objects that implement ParallelQuery{TSource}. This is the parallel equivalent of Enumerable.

**Namespace:**System.Linq

**Assemblies:**System.Linq.Parallel (in System.Linq.Parallel.dll)

System.Core (in System.Core.dll)

The ParallelEnumerable type exposes the following members.

Name | Description | |
---|---|---|

Aggregate(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, TSource, TSource)) | Applies in parallel an accumulator function over a sequence. | |

Aggregate(Of TSource, TAccumulate)(ParallelQuery(Of TSource), TAccumulate, Func(Of TAccumulate, TSource, TAccumulate)) | Applies in parallel an accumulator function over a sequence. The specified seed value is used as the initial accumulator value. | |

Aggregate(Of TSource, TAccumulate, TResult)(ParallelQuery(Of TSource), TAccumulate, Func(Of TAccumulate, TSource, TAccumulate), Func(Of TAccumulate, TResult)) | Applies in parallel an accumulator function over a sequence. The specified seed value is used as the initial accumulator value, and the specified function is used to select the result value. | |

Aggregate(Of TSource, TAccumulate, TResult)(ParallelQuery(Of TSource), Func(Of TAccumulate), Func(Of TAccumulate, TSource, TAccumulate), Func(Of TAccumulate, TAccumulate, TAccumulate), Func(Of TAccumulate, TResult)) | Applies in parallel an accumulator function over a sequence. This overload is not available in the sequential implementation. | |

Aggregate(Of TSource, TAccumulate, TResult)(ParallelQuery(Of TSource), TAccumulate, Func(Of TAccumulate, TSource, TAccumulate), Func(Of TAccumulate, TAccumulate, TAccumulate), Func(Of TAccumulate, TResult)) | Applies in parallel an accumulator function over a sequence. This overload is not available in the sequential implementation. | |

All(Of TSource) | Determines in parallel whether all elements of a sequence satisfy a condition. | |

Any(Of TSource)(ParallelQuery(Of TSource)) | Determines whether a parallel sequence contains any elements. | |

Any(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Boolean)) | Determines in parallel whether any element of a sequence satisfies a condition. | |

AsEnumerable(Of TSource) | Converts a ParallelQuery(Of TSource) into an IEnumerable(Of T) to force sequential evaluation of the query. | |

AsOrdered(ParallelQuery) | Enables treatment of a data source as if it were ordered, overriding the default of unordered. AsOrdered may only be invoked on non-generic sequences returned by AsParallel, ParallelEnumerable.Range, and ParallelEnumerable.Repeat. | |

AsOrdered(Of TSource)(ParallelQuery(Of TSource)) | Enables treatment of a data source as if it were ordered, overriding the default of unordered. AsOrdered may only be invoked on generic sequences returned by AsParallel, ParallelEnumerable.Range, and ParallelEnumerable.Repeat. | |

AsParallel(IEnumerable) | Enables parallelization of a query. | |

AsParallel(Of TSource)(IEnumerable(Of TSource)) | Enables parallelization of a query. | |

AsParallel(Of TSource)(Partitioner(Of TSource)) | Enables parallelization of a query, as sourced by a custom partitioner that is responsible for splitting the input sequence into partitions. | |

AsSequential(Of TSource) | Converts a ParallelQuery(Of TSource) into an IEnumerable(Of T) to force sequential evaluation of the query. | |

AsUnordered(Of TSource) | Allows an intermediate query to be treated as if no ordering is implied among the elements. | |

Average(ParallelQuery(Of Decimal)) | Computes in parallel the average of a sequence of values. | |

Average(ParallelQuery(Of Nullable(Of Decimal))) | Computes in parallel the average of a sequence of values. | |

Average(ParallelQuery(Of Double)) | Computes in parallel the average of a sequence of values. | |

Average(ParallelQuery(Of Nullable(Of Double))) | Computes in parallel the average of a sequence of values. | |

Average(ParallelQuery(Of Int32)) | Computes in parallel the average of a sequence of values. | |

Average(ParallelQuery(Of Nullable(Of Int32))) | Computes in parallel the average of a sequence of values. | |

Average(ParallelQuery(Of Int64)) | Computes in parallel the average of a sequence of values. | |

Average(ParallelQuery(Of Nullable(Of Int64))) | Computes in parallel the average of a sequence of values. | |

Average(ParallelQuery(Of Nullable(Of Single))) | Computes in parallel the average of a sequence of values. | |

Average(ParallelQuery(Of Single)) | Computes in parallel the average of a sequence of values. | |

Average(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Decimal)) | Computes in parallel the average of a sequence of values that are obtained by invoking a transform function on each element of the input sequence. | |

Average(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Double)) | Computes in parallel the average of a sequence of values that are obtained by invoking a transform function on each element of the input sequence. | |

Average(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Int32)) | Computes in parallel the average of a sequence of values that are obtained by invoking a transform function on each element of the input sequence. | |

Average(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Int64)) | ||

Average(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Decimal))) | ||

Average(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Double))) | ||

Average(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Int32))) | ||

Average(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Int64))) | ||

Average(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Single))) | ||

Average(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Single)) | ||

Cast(Of TResult) | Converts the elements of a ParallelQuery to the specified type. | |

Concat(Of TSource)(ParallelQuery(Of TSource), IEnumerable(Of TSource)) | Obsolete. This Concat overload should never be called. This method is marked as obsolete and always throws NotSupportedException when called. | |

Concat(Of TSource)(ParallelQuery(Of TSource), ParallelQuery(Of TSource)) | Concatenates two parallel sequences. | |

Contains(Of TSource)(ParallelQuery(Of TSource), TSource) | Determines in parallel whether a sequence contains a specified element by using the default equality comparer. | |

Contains(Of TSource)(ParallelQuery(Of TSource), TSource, IEqualityComparer(Of TSource)) | Determines in parallel whether a sequence contains a specified element by using a specified IEqualityComparer(Of T). | |

Count(Of TSource)(ParallelQuery(Of TSource)) | Returns the number of elements in a parallel sequence. | |

Count(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Boolean)) | Returns a number that represents how many elements in the specified parallel sequence satisfy a condition. | |

DefaultIfEmpty(Of TSource)(ParallelQuery(Of TSource)) | Returns the elements of the specified parallel sequence or the type parameter's default value in a singleton collection if the sequence is empty. | |

DefaultIfEmpty(Of TSource)(ParallelQuery(Of TSource), TSource) | Returns the elements of the specified parallel sequence or the specified value in a singleton collection if the sequence is empty. | |

Distinct(Of TSource)(ParallelQuery(Of TSource)) | Returns distinct elements from a parallel sequence by using the default equality comparer to compare values. | |

Distinct(Of TSource)(ParallelQuery(Of TSource), IEqualityComparer(Of TSource)) | Returns distinct elements from a parallel sequence by using a specified IEqualityComparer(Of T) to compare values. | |

ElementAt(Of TSource) | Returns the element at a specified index in a parallel sequence. | |

ElementAtOrDefault(Of TSource) | Returns the element at a specified index in a parallel sequence or a default value if the index is out of range. | |

Empty(Of TResult) | Returns an empty ParallelQuery{TResult} that has the specified type argument. | |

Except(Of TSource)(ParallelQuery(Of TSource), IEnumerable(Of TSource)) | Obsolete. This Except overload should never be called. This method is marked as obsolete and always throws NotSupportedException when called. | |

Except(Of TSource)(ParallelQuery(Of TSource), ParallelQuery(Of TSource)) | Produces the set difference of two parallel sequences by using the default equality comparer to compare values. | |

Except(Of TSource)(ParallelQuery(Of TSource), IEnumerable(Of TSource), IEqualityComparer(Of TSource)) | Obsolete. This Except overload should never be called. This method is marked as obsolete and always throws NotSupportedException when called. | |

Except(Of TSource)(ParallelQuery(Of TSource), ParallelQuery(Of TSource), IEqualityComparer(Of TSource)) | Produces the set difference of two parallel sequences by using the specified IEqualityComparer(Of T) to compare values. | |

First(Of TSource)(ParallelQuery(Of TSource)) | Returns the first element of a parallel sequence. | |

First(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Boolean)) | Returns the first element in a parallel sequence that satisfies a specified condition. | |

FirstOrDefault(Of TSource)(ParallelQuery(Of TSource)) | Returns the first element of a parallel sequence, or a default value if the sequence contains no elements. | |

FirstOrDefault(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Boolean)) | Returns the first element of the parallel sequence that satisfies a condition or a default value if no such element is found. | |

ForAll(Of TSource) | Invokes in parallel the specified action for each element in the source. | |

GroupBy(Of TSource, TKey)(ParallelQuery(Of TSource), Func(Of TSource, TKey)) | Groups in parallel the elements of a sequence according to a specified key selector function. | |

GroupBy(Of TSource, TKey)(ParallelQuery(Of TSource), Func(Of TSource, TKey), IEqualityComparer(Of TKey)) | Groups in parallel the elements of a sequence according to a specified key selector function and compares the keys by using a specified IComparer(Of T). | |

GroupBy(Of TSource, TKey, TElement)(ParallelQuery(Of TSource), Func(Of TSource, TKey), Func(Of TSource, TElement)) | Groups in parallel the elements of a sequence according to a specified key selector function and projects the elements for each group by using a specified function. | |

GroupBy(Of TSource, TKey, TResult)(ParallelQuery(Of TSource), Func(Of TSource, TKey), Func(Of TKey, IEnumerable(Of TSource), TResult)) | Groups in parallel the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. | |

GroupBy(Of TSource, TKey, TElement)(ParallelQuery(Of TSource), Func(Of TSource, TKey), Func(Of TSource, TElement), IEqualityComparer(Of TKey)) | Groups in parallel the elements of a sequence according to a key selector function. The keys are compared by using a comparer and each group's elements are projected by using a specified function. | |

GroupBy(Of TSource, TKey, TResult)(ParallelQuery(Of TSource), Func(Of TSource, TKey), Func(Of TKey, IEnumerable(Of TSource), TResult), IEqualityComparer(Of TKey)) | Groups in parallel the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The keys are compared by using a specified comparer. | |

GroupBy(Of TSource, TKey, TElement, TResult)(ParallelQuery(Of TSource), Func(Of TSource, TKey), Func(Of TSource, TElement), Func(Of TKey, IEnumerable(Of TElement), TResult)) | Groups in parallel the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The elements of each group are projected by using a specified function. | |

GroupBy(Of TSource, TKey, TElement, TResult)(ParallelQuery(Of TSource), Func(Of TSource, TKey), Func(Of TSource, TElement), Func(Of TKey, IEnumerable(Of TElement), TResult), IEqualityComparer(Of TKey)) | Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function. | |

GroupJoin(Of TOuter, TInner, TKey, TResult)(ParallelQuery(Of TOuter), IEnumerable(Of TInner), Func(Of TOuter, TKey), Func(Of TInner, TKey), Func(Of TOuter, IEnumerable(Of TInner), TResult)) | Obsolete. This GroupJoin overload should never be called. This method is marked as obsolete and always throws NotSupportedException when called. | |

GroupJoin(Of TOuter, TInner, TKey, TResult)(ParallelQuery(Of TOuter), ParallelQuery(Of TInner), Func(Of TOuter, TKey), Func(Of TInner, TKey), Func(Of TOuter, IEnumerable(Of TInner), TResult)) | Correlates in parallel the elements of two sequences based on equality of keys and groups the results. The default equality comparer is used to compare keys. | |

GroupJoin(Of TOuter, TInner, TKey, TResult)(ParallelQuery(Of TOuter), IEnumerable(Of TInner), Func(Of TOuter, TKey), Func(Of TInner, TKey), Func(Of TOuter, IEnumerable(Of TInner), TResult), IEqualityComparer(Of TKey)) | Obsolete. This GroupJoin overload should never be called. This method is marked as obsolete and always throws NotSupportedException when called. | |

GroupJoin(Of TOuter, TInner, TKey, TResult)(ParallelQuery(Of TOuter), ParallelQuery(Of TInner), Func(Of TOuter, TKey), Func(Of TInner, TKey), Func(Of TOuter, IEnumerable(Of TInner), TResult), IEqualityComparer(Of TKey)) | Correlates in parallel the elements of two sequences based on key equality and groups the results. A specified IEqualityComparer(Of T) is used to compare keys. | |

Intersect(Of TSource)(ParallelQuery(Of TSource), IEnumerable(Of TSource)) | Obsolete. This Intersect overload should never be called. This method is marked as obsolete and always throws NotSupportedException when called. | |

Intersect(Of TSource)(ParallelQuery(Of TSource), ParallelQuery(Of TSource)) | Produces the set intersection of two parallel sequences by using the default equality comparer to compare values. | |

Intersect(Of TSource)(ParallelQuery(Of TSource), IEnumerable(Of TSource), IEqualityComparer(Of TSource)) | Obsolete. This Intersect overload should never be called. This method is marked as obsolete and always throws NotSupportedException when called. | |

Intersect(Of TSource)(ParallelQuery(Of TSource), ParallelQuery(Of TSource), IEqualityComparer(Of TSource)) | Produces the set intersection of two parallel sequences by using the specified IEqualityComparer{T} to compare values. | |

Join(Of TOuter, TInner, TKey, TResult)(ParallelQuery(Of TOuter), IEnumerable(Of TInner), Func(Of TOuter, TKey), Func(Of TInner, TKey), Func(Of TOuter, TInner, TResult)) | Obsolete. This Join overload should never be called. This method is marked as obsolete and always throws NotSupportedException when invoked. | |

Join(Of TOuter, TInner, TKey, TResult)(ParallelQuery(Of TOuter), ParallelQuery(Of TInner), Func(Of TOuter, TKey), Func(Of TInner, TKey), Func(Of TOuter, TInner, TResult)) | Correlates in parallel the elements of two sequences based on matching keys. The default equality comparer is used to compare keys. | |

Join(Of TOuter, TInner, TKey, TResult)(ParallelQuery(Of TOuter), IEnumerable(Of TInner), Func(Of TOuter, TKey), Func(Of TInner, TKey), Func(Of TOuter, TInner, TResult), IEqualityComparer(Of TKey)) | Obsolete. This Join overload should never be called. This method is marked as obsolete and always throws NotSupportedException when invoked. | |

Join(Of TOuter, TInner, TKey, TResult)(ParallelQuery(Of TOuter), ParallelQuery(Of TInner), Func(Of TOuter, TKey), Func(Of TInner, TKey), Func(Of TOuter, TInner, TResult), IEqualityComparer(Of TKey)) | Correlates in parallel the elements of two sequences based on matching keys. A specified IEqualityComparer(Of T) is used to compare keys. | |

Last(Of TSource)(ParallelQuery(Of TSource)) | Returns the last element of a parallel sequence. | |

Last(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Boolean)) | Returns the last element of a parallel sequence that satisfies a specified condition. | |

LastOrDefault(Of TSource)(ParallelQuery(Of TSource)) | Returns the last element of a parallel sequence, or a default value if the sequence contains no elements. | |

LastOrDefault(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Boolean)) | Returns the last element of a parallel sequence that satisfies a condition, or a default value if no such element is found. | |

LongCount(Of TSource)(ParallelQuery(Of TSource)) | Returns an Int64 that represents the total number of elements in a parallel sequence. | |

LongCount(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Boolean)) | Returns an Int64 that represents how many elements in a parallel sequence satisfy a condition. | |

Max(ParallelQuery(Of Decimal)) | Returns the maximum value in a parallel sequence of values. | |

Max(ParallelQuery(Of Nullable(Of Decimal))) | Returns the maximum value in a parallel sequence of values. | |

Max(ParallelQuery(Of Double)) | Returns the maximum value in a parallel sequence of values. | |

Max(ParallelQuery(Of Nullable(Of Double))) | Returns the maximum value in a parallel sequence of values. | |

Max(ParallelQuery(Of Int32)) | Returns the maximum value in a parallel sequence of values. | |

Max(ParallelQuery(Of Nullable(Of Int32))) | Returns the maximum value in a parallel sequence of values. | |

Max(ParallelQuery(Of Int64)) | Returns the maximum value in a parallel sequence of values. | |

Max(ParallelQuery(Of Nullable(Of Int64))) | Returns the maximum value in a parallel sequence of values. | |

Max(ParallelQuery(Of Nullable(Of Single))) | Returns the maximum value in a parallel sequence of values. | |

Max(ParallelQuery(Of Single)) | Returns the maximum value in a parallel sequence of values. | |

Max(Of TSource)(ParallelQuery(Of TSource)) | Returns the maximum value in a parallel sequence of values. | |

Max(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Decimal)) | Invokes in parallel a transform function on each element of a sequence and returns the maximum value. | |

Max(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Double)) | Invokes in parallel a transform function on each element of a sequence and returns the maximum value. | |

Max(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Int32)) | Invokes in parallel a transform function on each element of a sequence and returns the maximum value. | |

Max(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Int64)) | ||

Max(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Decimal))) | ||

Max(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Double))) | ||

Max(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Int32))) | ||

Max(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Int64))) | ||

Max(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Single))) | ||

Max(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Single)) | ||

Max(Of TSource, TResult)(ParallelQuery(Of TSource), Func(Of TSource, TResult)) | ||

Min(ParallelQuery(Of Decimal)) | Returns the minimum value in a parallel sequence of values. | |

Min(ParallelQuery(Of Nullable(Of Decimal))) | Returns the minimum value in a parallel sequence of values. | |

Min(ParallelQuery(Of Double)) | Returns the minimum value in a parallel sequence of values. | |

Min(ParallelQuery(Of Nullable(Of Double))) | Returns the minimum value in a parallel sequence of values. | |

Min(ParallelQuery(Of Int32)) | Returns the minimum value in a parallel sequence of values. | |

Min(ParallelQuery(Of Nullable(Of Int32))) | Returns the minimum value in a parallel sequence of values. | |

Min(ParallelQuery(Of Int64)) | Returns the minimum value in a parallel sequence of values. | |

Min(ParallelQuery(Of Nullable(Of Int64))) | Returns the minimum value in a parallel sequence of values. | |

Min(ParallelQuery(Of Nullable(Of Single))) | Returns the minimum value in a parallel sequence of values. | |

Min(ParallelQuery(Of Single)) | Returns the minimum value in a parallel sequence of values. | |

Min(Of TSource)(ParallelQuery(Of TSource)) | Returns the minimum value in a parallel sequence of values. | |

Min(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Decimal)) | Invokes in parallel a transform function on each element of a sequence and returns the minimum value. | |

Min(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Double)) | Invokes in parallel a transform function on each element of a sequence and returns the minimum value. | |

Min(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Int32)) | Invokes in parallel a transform function on each element of a sequence and returns the minimum value. | |

Min(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Int64)) | ||

Min(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Decimal))) | ||

Min(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Double))) | ||

Min(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Int32))) | ||

Min(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Int64))) | ||

Min(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Single))) | ||

Min(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Single)) | ||

Min(Of TSource, TResult)(ParallelQuery(Of TSource), Func(Of TSource, TResult)) | ||

OfType(Of TResult) | Filters the elements of a ParallelQuery based on a specified type. | |

OrderBy(Of TSource, TKey)(ParallelQuery(Of TSource), Func(Of TSource, TKey)) | Sorts in parallel the elements of a sequence in ascending order according to a key. | |

OrderBy(Of TSource, TKey)(ParallelQuery(Of TSource), Func(Of TSource, TKey), IComparer(Of TKey)) | Sorts in parallel the elements of a sequence in ascending order by using a specified comparer. | |

OrderByDescending(Of TSource, TKey)(ParallelQuery(Of TSource), Func(Of TSource, TKey)) | Sorts in parallel the elements of a sequence in descending order according to a key. | |

OrderByDescending(Of TSource, TKey)(ParallelQuery(Of TSource), Func(Of TSource, TKey), IComparer(Of TKey)) | Sorts the elements of a sequence in descending order by using a specified comparer. | |

Range | Generates a parallel sequence of integral numbers within a specified range. | |

Repeat(Of TResult) | Generates a parallel sequence that contains one repeated value. | |

Reverse(Of TSource) | Inverts the order of the elements in a parallel sequence. | |

Select(Of TSource, TResult)(ParallelQuery(Of TSource), Func(Of TSource, TResult)) | Projects in parallel each element of a sequence into a new form. | |

Select(Of TSource, TResult)(ParallelQuery(Of TSource), Func(Of TSource, Int32, TResult)) | Projects in parallel each element of a sequence into a new form by incorporating the element's index. | |

SelectMany(Of TSource, TResult)(ParallelQuery(Of TSource), Func(Of TSource, IEnumerable(Of TResult))) | Projects in parallel each element of a sequence to an IEnumerable(Of T) and flattens the resulting sequences into one sequence. | |

SelectMany(Of TSource, TResult)(ParallelQuery(Of TSource), Func(Of TSource, Int32, IEnumerable(Of TResult))) | Projects in parallel each element of a sequence to an IEnumerable(Of T), and flattens the resulting sequences into one sequence. The index of each source element is used in the projected form of that element. | |

SelectMany(Of TSource, TCollection, TResult)(ParallelQuery(Of TSource), Func(Of TSource, IEnumerable(Of TCollection)), Func(Of TSource, TCollection, TResult)) | Projects each element of a sequence to an IEnumerable(Of T), flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein. | |

SelectMany(Of TSource, TCollection, TResult)(ParallelQuery(Of TSource), Func(Of TSource, Int32, IEnumerable(Of TCollection)), Func(Of TSource, TCollection, TResult)) | Projects each element of a sequence to an IEnumerable(Of T), flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein. The index of each source element is used in the intermediate projected form of that element. | |

SequenceEqual(Of TSource)(ParallelQuery(Of TSource), IEnumerable(Of TSource)) | Obsolete. This SequenceEqual overload should never be called. This method is marked as obsolete and always throws NotSupportedException when called. | |

SequenceEqual(Of TSource)(ParallelQuery(Of TSource), ParallelQuery(Of TSource)) | Determines whether two parallel sequences are equal by comparing the elements by using the default equality comparer for their type. | |

SequenceEqual(Of TSource)(ParallelQuery(Of TSource), IEnumerable(Of TSource), IEqualityComparer(Of TSource)) | Obsolete. This SequenceEqual overload should never be called. This method is marked as obsolete and always throws NotSupportedException when called. | |

SequenceEqual(Of TSource)(ParallelQuery(Of TSource), ParallelQuery(Of TSource), IEqualityComparer(Of TSource)) | Determines whether two parallel sequences are equal by comparing their elements by using a specified IEqualityComparer{T}. | |

Single(Of TSource)(ParallelQuery(Of TSource)) | Returns the only element of a parallel sequence, and throws an exception if there is not exactly one element in the sequence. | |

Single(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Boolean)) | Returns the only element of a parallel sequence that satisfies a specified condition, and throws an exception if more than one such element exists. | |

SingleOrDefault(Of TSource)(ParallelQuery(Of TSource)) | Returns the only element of a parallel sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence. | |

SingleOrDefault(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Boolean)) | Returns the only element of a parallel sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition. | |

Skip(Of TSource) | Bypasses a specified number of elements in a parallel sequence and then returns the remaining elements. | |

SkipWhile(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Boolean)) | Bypasses elements in a parallel sequence as long as a specified condition is true and then returns the remaining elements. | |

SkipWhile(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Int32, Boolean)) | Bypasses elements in a parallel sequence as long as a specified condition is true and then returns the remaining elements. The element's index is used in the logic of the predicate function. | |

Sum(ParallelQuery(Of Decimal)) | Computes in parallel the sum of a sequence of values. | |

Sum(ParallelQuery(Of Nullable(Of Decimal))) | Computes in parallel the sum of a sequence of values. | |

Sum(ParallelQuery(Of Double)) | Computes in parallel the sum of a sequence of values. | |

Sum(ParallelQuery(Of Nullable(Of Double))) | Computes in parallel the sum of a sequence of values. | |

Sum(ParallelQuery(Of Int32)) | Computes in parallel the sum of a sequence of values. | |

Sum(ParallelQuery(Of Nullable(Of Int32))) | Computes in parallel the sum of a sequence of values. | |

Sum(ParallelQuery(Of Int64)) | Computes in parallel the sum of a sequence of values. | |

Sum(ParallelQuery(Of Nullable(Of Int64))) | Computes in parallel the sum of a sequence of values. | |

Sum(ParallelQuery(Of Nullable(Of Single))) | Computes in parallel the sum of a sequence of values. | |

Sum(ParallelQuery(Of Single)) | Computes in parallel the sum of a sequence of values. | |

Sum(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Decimal)) | Computes in parallel the sum of the sequence of values that are obtained by invoking a transform function on each element of the input sequence. | |

Sum(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Double)) | Computes in parallel the sum of the sequence of values that are obtained by invoking a transform function on each element of the input sequence. | |

Sum(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Int32)) | Computes in parallel the sum of the sequence of values that are obtained by invoking a transform function on each element of the input sequence. | |

Sum(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Int64)) | ||

Sum(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Decimal))) | ||

Sum(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Double))) | ||

Sum(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Int32))) | ||

Sum(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Int64))) | ||

Sum(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Single))) | ||

Sum(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Single)) | ||

Take(Of TSource) | Returns a specified number of contiguous elements from the start of a parallel sequence. | |

TakeWhile(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Boolean)) | Returns elements from a parallel sequence as long as a specified condition is true. | |

TakeWhile(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Int32, Boolean)) | Returns elements from a parallel sequence as long as a specified condition is true. The element's index is used in the logic of the predicate function. | |

ThenBy(Of TSource, TKey)(OrderedParallelQuery(Of TSource), Func(Of TSource, TKey)) | Performs in parallel a subsequent ordering of the elements in a sequence in ascending order according to a key. | |

ThenBy(Of TSource, TKey)(OrderedParallelQuery(Of TSource), Func(Of TSource, TKey), IComparer(Of TKey)) | Performs in parallel a subsequent ordering of the elements in a sequence in ascending order by using a specified comparer. | |

ThenByDescending(Of TSource, TKey)(OrderedParallelQuery(Of TSource), Func(Of TSource, TKey)) | Performs in parallel a subsequent ordering of the elements in a sequence in descending order, according to a key. | |

ThenByDescending(Of TSource, TKey)(OrderedParallelQuery(Of TSource), Func(Of TSource, TKey), IComparer(Of TKey)) | Performs in parallel a subsequent ordering of the elements in a sequence in descending order by using a specified comparer. | |

ToArray(Of TSource) | Creates an array from a ParallelQuery(Of TSource). | |

ToDictionary(Of TSource, TKey)(ParallelQuery(Of TSource), Func(Of TSource, TKey)) | Creates a Dictionary(Of TKey, TValue) from a ParallelQuery(Of TSource) according to a specified key selector function. | |

ToDictionary(Of TSource, TKey)(ParallelQuery(Of TSource), Func(Of TSource, TKey), IEqualityComparer(Of TKey)) | Creates a Dictionary(Of TKey, TValue) from a ParallelQuery(Of TSource) according to a specified key selector function and key comparer. | |

ToDictionary(Of TSource, TKey, TElement)(ParallelQuery(Of TSource), Func(Of TSource, TKey), Func(Of TSource, TElement)) | Creates a Dictionary(Of TKey, TValue) from a ParallelQuery(Of TSource) according to specified key selector and element selector functions. | |

ToDictionary(Of TSource, TKey, TElement)(ParallelQuery(Of TSource), Func(Of TSource, TKey), Func(Of TSource, TElement), IEqualityComparer(Of TKey)) | Creates a Dictionary(Of TKey, TValue) from a ParallelQuery(Of TSource) according to a specified key selector function, a comparer, and an element selector function. | |

ToList(Of TSource) | Creates a List(Of T) from an ParallelQuery(Of TSource). | |

ToLookup(Of TSource, TKey)(ParallelQuery(Of TSource), Func(Of TSource, TKey)) | Creates an ILookup(Of TKey, TElement) from a ParallelQuery(Of TSource) according to a specified key selector function. | |

ToLookup(Of TSource, TKey)(ParallelQuery(Of TSource), Func(Of TSource, TKey), IEqualityComparer(Of TKey)) | Creates an ILookup(Of TKey, TElement) from a ParallelQuery(Of TSource) according to a specified key selector function and key comparer. | |

ToLookup(Of TSource, TKey, TElement)(ParallelQuery(Of TSource), Func(Of TSource, TKey), Func(Of TSource, TElement)) | Creates an ILookup(Of TKey, TElement) from a ParallelQuery(Of TSource) according to specified key selector and element selector functions. | |

ToLookup(Of TSource, TKey, TElement)(ParallelQuery(Of TSource), Func(Of TSource, TKey), Func(Of TSource, TElement), IEqualityComparer(Of TKey)) | Creates an ILookup(Of TKey, TElement) from a ParallelQuery(Of TSource) according to a specified key selector function, a comparer and an element selector function. | |

Union(Of TSource)(ParallelQuery(Of TSource), IEnumerable(Of TSource)) | Obsolete. This Union overload should never be called. This method is marked as obsolete and always throws NotSupportedException when called. | |

Union(Of TSource)(ParallelQuery(Of TSource), ParallelQuery(Of TSource)) | Produces the set union of two parallel sequences by using the default equality comparer. | |

Union(Of TSource)(ParallelQuery(Of TSource), IEnumerable(Of TSource), IEqualityComparer(Of TSource)) | Obsolete. This Union overload should never be called. This method is marked as obsolete and always throws NotSupportedException when called. | |

Union(Of TSource)(ParallelQuery(Of TSource), ParallelQuery(Of TSource), IEqualityComparer(Of TSource)) | Produces the set union of two parallel sequences by using a specified IEqualityComparer{T}. | |

Where(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Boolean)) | Filters in parallel a sequence of values based on a predicate. | |

Where(Of TSource)(ParallelQuery(Of TSource), Func(Of TSource, Int32, Boolean)) | Filters in parallel a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function. | |

WithCancellation(Of TSource) | Sets the CancellationToken to associate with the query. | |

WithDegreeOfParallelism(Of TSource) | Sets the degree of parallelism to use in a query. Degree of parallelism is the maximum number of concurrently executing tasks that will be used to process the query. | |

WithExecutionMode(Of TSource) | Sets the execution mode of the query. | |

WithMergeOptions(Of TSource) | Sets the merge options for this query, which specify how the query will buffer output. | |

Zip(Of TFirst, TSecond, TResult)(ParallelQuery(Of TFirst), IEnumerable(Of TSecond), Func(Of TFirst, TSecond, TResult)) | Obsolete. This Zip overload should never be called. This method is marked as obsolete and always throws NotSupportedException when invoked. | |

Zip(Of TFirst, TSecond, TResult)(ParallelQuery(Of TFirst), ParallelQuery(Of TSecond), Func(Of TFirst, TSecond, TResult)) | Merges in parallel two sequences by using the specified predicate function. |

Show: