Enumerable Class

 

Provides a set of static (Shared in Visual Basic) methods for querying objects that implement IEnumerable<'T>.

Namespace:   System.Linq
Assembly:  System.Core (in System.Core.dll)

System.Object
  System.Linq.Enumerable

[<AbstractClass>]
[<Sealed>]
type Enumerable = class end

NameDescription
System_CAPS_pubmethodSystem_CAPS_staticAggregate<'TSource>(IEnumerable<'TSource>, Func<'TSource, 'TSource, 'TSource>)

Applies an accumulator function over a sequence.

System_CAPS_pubmethodSystem_CAPS_staticAggregate<'TSource, 'TAccumulate>(IEnumerable<'TSource>, 'TAccumulate, Func<'TAccumulate, 'TSource, 'TAccumulate>)

Applies an accumulator function over a sequence. The specified seed value is used as the initial accumulator value.

System_CAPS_pubmethodSystem_CAPS_staticAggregate<'TSource, 'TAccumulate, 'TResult>(IEnumerable<'TSource>, 'TAccumulate, Func<'TAccumulate, 'TSource, 'TAccumulate>, Func<'TAccumulate, 'TResult>)

Applies 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.

System_CAPS_pubmethodSystem_CAPS_staticAll<'TSource>(IEnumerable<'TSource>, Func<'TSource, Boolean>)

Determines whether all elements of a sequence satisfy a condition.

System_CAPS_pubmethodSystem_CAPS_staticAny<'TSource>(IEnumerable<'TSource>)

Determines whether a sequence contains any elements.

System_CAPS_pubmethodSystem_CAPS_staticAny<'TSource>(IEnumerable<'TSource>, Func<'TSource, Boolean>)

Determines whether any element of a sequence satisfies a condition.

System_CAPS_pubmethodSystem_CAPS_staticAsEnumerable<'TSource>(IEnumerable<'TSource>)

Returns the input typed as IEnumerable<'T>.

System_CAPS_pubmethodSystem_CAPS_staticAverage(IEnumerable<Decimal>)

Computes the average of a sequence of Decimal values.

System_CAPS_pubmethodSystem_CAPS_staticAverage(IEnumerable<Double>)

Computes the average of a sequence of Double values.

System_CAPS_pubmethodSystem_CAPS_staticAverage(IEnumerable<Int32>)

Computes the average of a sequence of Int32 values.

System_CAPS_pubmethodSystem_CAPS_staticAverage(IEnumerable<Int64>)

Computes the average of a sequence of Int64 values.

System_CAPS_pubmethodSystem_CAPS_staticAverage(IEnumerable<Nullable<Decimal>>)

Computes the average of a sequence of nullable Decimal values.

System_CAPS_pubmethodSystem_CAPS_staticAverage(IEnumerable<Nullable<Double>>)

Computes the average of a sequence of nullable Double values.

System_CAPS_pubmethodSystem_CAPS_staticAverage(IEnumerable<Nullable<Int32>>)

Computes the average of a sequence of nullable Int32 values.

System_CAPS_pubmethodSystem_CAPS_staticAverage(IEnumerable<Nullable<Int64>>)

Computes the average of a sequence of nullable Int64 values.

System_CAPS_pubmethodSystem_CAPS_staticAverage(IEnumerable<Nullable<Single>>)

Computes the average of a sequence of nullable Single values.

System_CAPS_pubmethodSystem_CAPS_staticAverage(IEnumerable<Single>)

Computes the average of a sequence of Single values.

System_CAPS_pubmethodSystem_CAPS_staticAverage<'TSource>(IEnumerable<'TSource>, Func<'TSource, Decimal>)

Computes the average of a sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticAverage<'TSource>(IEnumerable<'TSource>, Func<'TSource, Double>)

Computes the average of a sequence of Double values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticAverage<'TSource>(IEnumerable<'TSource>, Func<'TSource, Int32>)

Computes the average of a sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticAverage<'TSource>(IEnumerable<'TSource>, Func<'TSource, Int64>)

Computes the average of a sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticAverage<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Decimal>>)

Computes the average of a sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticAverage<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Double>>)

Computes the average of a sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticAverage<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Int32>>)

Computes the average of a sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticAverage<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Int64>>)

Computes the average of a sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticAverage<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Single>>)

Computes the average of a sequence of nullable Single values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticAverage<'TSource>(IEnumerable<'TSource>, Func<'TSource, Single>)

Computes the average of a sequence of Single values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticCast<'TResult>(IEnumerable)

Casts the elements of an IEnumerable to the specified type.

System_CAPS_pubmethodSystem_CAPS_staticConcat<'TSource>(IEnumerable<'TSource>, IEnumerable<'TSource>)

Concatenates two sequences.

System_CAPS_pubmethodSystem_CAPS_staticContains<'TSource>(IEnumerable<'TSource>, 'TSource)

Determines whether a sequence contains a specified element by using the default equality comparer.

System_CAPS_pubmethodSystem_CAPS_staticContains<'TSource>(IEnumerable<'TSource>, 'TSource, IEqualityComparer<'TSource>)

Determines whether a sequence contains a specified element by using a specified IEqualityComparer<'T>.

System_CAPS_pubmethodSystem_CAPS_staticCount<'TSource>(IEnumerable<'TSource>)

Returns the number of elements in a sequence.

System_CAPS_pubmethodSystem_CAPS_staticCount<'TSource>(IEnumerable<'TSource>, Func<'TSource, Boolean>)

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

System_CAPS_pubmethodSystem_CAPS_staticDefaultIfEmpty<'TSource>(IEnumerable<'TSource>)

Returns the elements of the specified sequence or the type parameter's default value in a singleton collection if the sequence is empty.

System_CAPS_pubmethodSystem_CAPS_staticDefaultIfEmpty<'TSource>(IEnumerable<'TSource>, 'TSource)

Returns the elements of the specified sequence or the specified value in a singleton collection if the sequence is empty.

System_CAPS_pubmethodSystem_CAPS_staticDistinct<'TSource>(IEnumerable<'TSource>)

Returns distinct elements from a sequence by using the default equality comparer to compare values.

System_CAPS_pubmethodSystem_CAPS_staticDistinct<'TSource>(IEnumerable<'TSource>, IEqualityComparer<'TSource>)

Returns distinct elements from a sequence by using a specified IEqualityComparer<'T> to compare values.

System_CAPS_pubmethodSystem_CAPS_staticElementAt<'TSource>(IEnumerable<'TSource>, Int32)

Returns the element at a specified index in a sequence.

System_CAPS_pubmethodSystem_CAPS_staticElementAtOrDefault<'TSource>(IEnumerable<'TSource>, Int32)

Returns the element at a specified index in a sequence or a default value if the index is out of range.

System_CAPS_pubmethodSystem_CAPS_staticEmpty<'TResult>()

Returns an empty IEnumerable<'T> that has the specified type argument.

System_CAPS_pubmethodSystem_CAPS_staticExcept<'TSource>(IEnumerable<'TSource>, IEnumerable<'TSource>)

Produces the set difference of two sequences by using the default equality comparer to compare values.

System_CAPS_pubmethodSystem_CAPS_staticExcept<'TSource>(IEnumerable<'TSource>, IEnumerable<'TSource>, IEqualityComparer<'TSource>)

Produces the set difference of two sequences by using the specified IEqualityComparer<'T> to compare values.

System_CAPS_pubmethodSystem_CAPS_staticFirst<'TSource>(IEnumerable<'TSource>)

Returns the first element of a sequence.

System_CAPS_pubmethodSystem_CAPS_staticFirst<'TSource>(IEnumerable<'TSource>, Func<'TSource, Boolean>)

Returns the first element in a sequence that satisfies a specified condition.

System_CAPS_pubmethodSystem_CAPS_staticFirstOrDefault<'TSource>(IEnumerable<'TSource>)

Returns the first element of a sequence, or a default value if the sequence contains no elements.

System_CAPS_pubmethodSystem_CAPS_staticFirstOrDefault<'TSource>(IEnumerable<'TSource>, Func<'TSource, Boolean>)

Returns the first element of the sequence that satisfies a condition or a default value if no such element is found.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<'TSource, 'TKey>(IEnumerable<'TSource>, Func<'TSource, 'TKey>)

Groups the elements of a sequence according to a specified key selector function.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<'TSource, 'TKey>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, IEqualityComparer<'TKey>)

Groups the elements of a sequence according to a specified key selector function and compares the keys by using a specified comparer.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<'TSource, 'TKey, 'TElement>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, Func<'TSource, 'TElement>)

Groups the elements of a sequence according to a specified key selector function and projects the elements for each group by using a specified function.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<'TSource, 'TKey, 'TElement>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, Func<'TSource, 'TElement>, IEqualityComparer<'TKey>)

Groups 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.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<'TSource, 'TKey, 'TResult>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, Func<'TKey, IEnumerable<'TSource>, 'TResult>)

Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<'TSource, 'TKey, 'TResult>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, Func<'TKey, IEnumerable<'TSource>, 'TResult>, IEqualityComparer<'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. The keys are compared by using a specified comparer.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<'TSource, 'TKey, 'TElement, 'TResult>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, Func<'TSource, 'TElement>, Func<'TKey, IEnumerable<'TElement>, 'TResult>)

Groups 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.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<'TSource, 'TKey, 'TElement, 'TResult>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, Func<'TSource, 'TElement>, Func<'TKey, IEnumerable<'TElement>, 'TResult>, IEqualityComparer<'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.

System_CAPS_pubmethodSystem_CAPS_staticGroupJoin<'TOuter, 'TInner, 'TKey, 'TResult>(IEnumerable<'TOuter>, IEnumerable<'TInner>, Func<'TOuter, 'TKey>, Func<'TInner, 'TKey>, Func<'TOuter, IEnumerable<'TInner>, 'TResult>)

Correlates the elements of two sequences based on equality of keys and groups the results. The default equality comparer is used to compare keys.

System_CAPS_pubmethodSystem_CAPS_staticGroupJoin<'TOuter, 'TInner, 'TKey, 'TResult>(IEnumerable<'TOuter>, IEnumerable<'TInner>, Func<'TOuter, 'TKey>, Func<'TInner, 'TKey>, Func<'TOuter, IEnumerable<'TInner>, 'TResult>, IEqualityComparer<'TKey>)

Correlates the elements of two sequences based on key equality and groups the results. A specified IEqualityComparer<'T> is used to compare keys.

System_CAPS_pubmethodSystem_CAPS_staticIntersect<'TSource>(IEnumerable<'TSource>, IEnumerable<'TSource>)

Produces the set intersection of two sequences by using the default equality comparer to compare values.

System_CAPS_pubmethodSystem_CAPS_staticIntersect<'TSource>(IEnumerable<'TSource>, IEnumerable<'TSource>, IEqualityComparer<'TSource>)

Produces the set intersection of two sequences by using the specified IEqualityComparer<'T> to compare values.

System_CAPS_pubmethodSystem_CAPS_staticJoin<'TOuter, 'TInner, 'TKey, 'TResult>(IEnumerable<'TOuter>, IEnumerable<'TInner>, Func<'TOuter, 'TKey>, Func<'TInner, 'TKey>, Func<'TOuter, 'TInner, 'TResult>)

Correlates the elements of two sequences based on matching keys. The default equality comparer is used to compare keys.

System_CAPS_pubmethodSystem_CAPS_staticJoin<'TOuter, 'TInner, 'TKey, 'TResult>(IEnumerable<'TOuter>, IEnumerable<'TInner>, Func<'TOuter, 'TKey>, Func<'TInner, 'TKey>, Func<'TOuter, 'TInner, 'TResult>, IEqualityComparer<'TKey>)

Correlates the elements of two sequences based on matching keys. A specified IEqualityComparer<'T> is used to compare keys.

System_CAPS_pubmethodSystem_CAPS_staticLast<'TSource>(IEnumerable<'TSource>)

Returns the last element of a sequence.

System_CAPS_pubmethodSystem_CAPS_staticLast<'TSource>(IEnumerable<'TSource>, Func<'TSource, Boolean>)

Returns the last element of a sequence that satisfies a specified condition.

System_CAPS_pubmethodSystem_CAPS_staticLastOrDefault<'TSource>(IEnumerable<'TSource>)

Returns the last element of a sequence, or a default value if the sequence contains no elements.

System_CAPS_pubmethodSystem_CAPS_staticLastOrDefault<'TSource>(IEnumerable<'TSource>, Func<'TSource, Boolean>)

Returns the last element of a sequence that satisfies a condition or a default value if no such element is found.

System_CAPS_pubmethodSystem_CAPS_staticLongCount<'TSource>(IEnumerable<'TSource>)

Returns an Int64 that represents the total number of elements in a sequence.

System_CAPS_pubmethodSystem_CAPS_staticLongCount<'TSource>(IEnumerable<'TSource>, Func<'TSource, Boolean>)

Returns an Int64 that represents how many elements in a sequence satisfy a condition.

System_CAPS_pubmethodSystem_CAPS_staticMax(IEnumerable<Decimal>)

Returns the maximum value in a sequence of Decimal values.

System_CAPS_pubmethodSystem_CAPS_staticMax(IEnumerable<Double>)

Returns the maximum value in a sequence of Double values.

System_CAPS_pubmethodSystem_CAPS_staticMax(IEnumerable<Int32>)

Returns the maximum value in a sequence of Int32 values.

System_CAPS_pubmethodSystem_CAPS_staticMax(IEnumerable<Int64>)

Returns the maximum value in a sequence of Int64 values.

System_CAPS_pubmethodSystem_CAPS_staticMax(IEnumerable<Nullable<Decimal>>)

Returns the maximum value in a sequence of nullable Decimal values.

System_CAPS_pubmethodSystem_CAPS_staticMax(IEnumerable<Nullable<Double>>)

Returns the maximum value in a sequence of nullable Double values.

System_CAPS_pubmethodSystem_CAPS_staticMax(IEnumerable<Nullable<Int32>>)

Returns the maximum value in a sequence of nullable Int32 values.

System_CAPS_pubmethodSystem_CAPS_staticMax(IEnumerable<Nullable<Int64>>)

Returns the maximum value in a sequence of nullable Int64 values.

System_CAPS_pubmethodSystem_CAPS_staticMax(IEnumerable<Nullable<Single>>)

Returns the maximum value in a sequence of nullable Single values.

System_CAPS_pubmethodSystem_CAPS_staticMax(IEnumerable<Single>)

Returns the maximum value in a sequence of Single values.

System_CAPS_pubmethodSystem_CAPS_staticMax<'TSource>(IEnumerable<'TSource>)

Returns the maximum value in a generic sequence.

System_CAPS_pubmethodSystem_CAPS_staticMax<'TSource>(IEnumerable<'TSource>, Func<'TSource, Decimal>)

Invokes a transform function on each element of a sequence and returns the maximum Decimal value.

System_CAPS_pubmethodSystem_CAPS_staticMax<'TSource>(IEnumerable<'TSource>, Func<'TSource, Double>)

Invokes a transform function on each element of a sequence and returns the maximum Double value.

System_CAPS_pubmethodSystem_CAPS_staticMax<'TSource>(IEnumerable<'TSource>, Func<'TSource, Int32>)

Invokes a transform function on each element of a sequence and returns the maximum Int32 value.

System_CAPS_pubmethodSystem_CAPS_staticMax<'TSource>(IEnumerable<'TSource>, Func<'TSource, Int64>)

Invokes a transform function on each element of a sequence and returns the maximum Int64 value.

System_CAPS_pubmethodSystem_CAPS_staticMax<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Decimal>>)

Invokes a transform function on each element of a sequence and returns the maximum nullable Decimal value.

System_CAPS_pubmethodSystem_CAPS_staticMax<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Double>>)

Invokes a transform function on each element of a sequence and returns the maximum nullable Double value.

System_CAPS_pubmethodSystem_CAPS_staticMax<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Int32>>)

Invokes a transform function on each element of a sequence and returns the maximum nullable Int32 value.

System_CAPS_pubmethodSystem_CAPS_staticMax<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Int64>>)

Invokes a transform function on each element of a sequence and returns the maximum nullable Int64 value.

System_CAPS_pubmethodSystem_CAPS_staticMax<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Single>>)

Invokes a transform function on each element of a sequence and returns the maximum nullable Single value.

System_CAPS_pubmethodSystem_CAPS_staticMax<'TSource>(IEnumerable<'TSource>, Func<'TSource, Single>)

Invokes a transform function on each element of a sequence and returns the maximum Single value.

System_CAPS_pubmethodSystem_CAPS_staticMax<'TSource, 'TResult>(IEnumerable<'TSource>, Func<'TSource, 'TResult>)

Invokes a transform function on each element of a generic sequence and returns the maximum resulting value.

System_CAPS_pubmethodSystem_CAPS_staticMin(IEnumerable<Decimal>)

Returns the minimum value in a sequence of Decimal values.

System_CAPS_pubmethodSystem_CAPS_staticMin(IEnumerable<Double>)

Returns the minimum value in a sequence of Double values.

System_CAPS_pubmethodSystem_CAPS_staticMin(IEnumerable<Int32>)

Returns the minimum value in a sequence of Int32 values.

System_CAPS_pubmethodSystem_CAPS_staticMin(IEnumerable<Int64>)

Returns the minimum value in a sequence of Int64 values.

System_CAPS_pubmethodSystem_CAPS_staticMin(IEnumerable<Nullable<Decimal>>)

Returns the minimum value in a sequence of nullable Decimal values.

System_CAPS_pubmethodSystem_CAPS_staticMin(IEnumerable<Nullable<Double>>)

Returns the minimum value in a sequence of nullable Double values.

System_CAPS_pubmethodSystem_CAPS_staticMin(IEnumerable<Nullable<Int32>>)

Returns the minimum value in a sequence of nullable Int32 values.

System_CAPS_pubmethodSystem_CAPS_staticMin(IEnumerable<Nullable<Int64>>)

Returns the minimum value in a sequence of nullable Int64 values.

System_CAPS_pubmethodSystem_CAPS_staticMin(IEnumerable<Nullable<Single>>)

Returns the minimum value in a sequence of nullable Single values.

System_CAPS_pubmethodSystem_CAPS_staticMin(IEnumerable<Single>)

Returns the minimum value in a sequence of Single values.

System_CAPS_pubmethodSystem_CAPS_staticMin<'TSource>(IEnumerable<'TSource>)

Returns the minimum value in a generic sequence.

System_CAPS_pubmethodSystem_CAPS_staticMin<'TSource>(IEnumerable<'TSource>, Func<'TSource, Decimal>)

Invokes a transform function on each element of a sequence and returns the minimum Decimal value.

System_CAPS_pubmethodSystem_CAPS_staticMin<'TSource>(IEnumerable<'TSource>, Func<'TSource, Double>)

Invokes a transform function on each element of a sequence and returns the minimum Double value.

System_CAPS_pubmethodSystem_CAPS_staticMin<'TSource>(IEnumerable<'TSource>, Func<'TSource, Int32>)

Invokes a transform function on each element of a sequence and returns the minimum Int32 value.

System_CAPS_pubmethodSystem_CAPS_staticMin<'TSource>(IEnumerable<'TSource>, Func<'TSource, Int64>)

Invokes a transform function on each element of a sequence and returns the minimum Int64 value.

System_CAPS_pubmethodSystem_CAPS_staticMin<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Decimal>>)

Invokes a transform function on each element of a sequence and returns the minimum nullable Decimal value.

System_CAPS_pubmethodSystem_CAPS_staticMin<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Double>>)

Invokes a transform function on each element of a sequence and returns the minimum nullable Double value.

System_CAPS_pubmethodSystem_CAPS_staticMin<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Int32>>)

Invokes a transform function on each element of a sequence and returns the minimum nullable Int32 value.

System_CAPS_pubmethodSystem_CAPS_staticMin<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Int64>>)

Invokes a transform function on each element of a sequence and returns the minimum nullable Int64 value.

System_CAPS_pubmethodSystem_CAPS_staticMin<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Single>>)

Invokes a transform function on each element of a sequence and returns the minimum nullable Single value.

System_CAPS_pubmethodSystem_CAPS_staticMin<'TSource>(IEnumerable<'TSource>, Func<'TSource, Single>)

Invokes a transform function on each element of a sequence and returns the minimum Single value.

System_CAPS_pubmethodSystem_CAPS_staticMin<'TSource, 'TResult>(IEnumerable<'TSource>, Func<'TSource, 'TResult>)

Invokes a transform function on each element of a generic sequence and returns the minimum resulting value.

System_CAPS_pubmethodSystem_CAPS_staticOfType<'TResult>(IEnumerable)

Filters the elements of an IEnumerable based on a specified type.

System_CAPS_pubmethodSystem_CAPS_staticOrderBy<'TSource, 'TKey>(IEnumerable<'TSource>, Func<'TSource, 'TKey>)

Sorts the elements of a sequence in ascending order according to a key.

System_CAPS_pubmethodSystem_CAPS_staticOrderBy<'TSource, 'TKey>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, IComparer<'TKey>)

Sorts the elements of a sequence in ascending order by using a specified comparer.

System_CAPS_pubmethodSystem_CAPS_staticOrderByDescending<'TSource, 'TKey>(IEnumerable<'TSource>, Func<'TSource, 'TKey>)

Sorts the elements of a sequence in descending order according to a key.

System_CAPS_pubmethodSystem_CAPS_staticOrderByDescending<'TSource, 'TKey>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, IComparer<'TKey>)

Sorts the elements of a sequence in descending order by using a specified comparer.

System_CAPS_pubmethodSystem_CAPS_staticRange(Int32, Int32)

Generates a sequence of integral numbers within a specified range.

System_CAPS_pubmethodSystem_CAPS_staticRepeat<'TResult>('TResult, Int32)

Generates a sequence that contains one repeated value.

System_CAPS_pubmethodSystem_CAPS_staticReverse<'TSource>(IEnumerable<'TSource>)

Inverts the order of the elements in a sequence.

System_CAPS_pubmethodSystem_CAPS_staticSelect<'TSource, 'TResult>(IEnumerable<'TSource>, Func<'TSource, 'TResult>)

Projects each element of a sequence into a new form.

System_CAPS_pubmethodSystem_CAPS_staticSelect<'TSource, 'TResult>(IEnumerable<'TSource>, Func<'TSource, Int32, 'TResult>)

Projects each element of a sequence into a new form by incorporating the element's index.

System_CAPS_pubmethodSystem_CAPS_staticSelectMany<'TSource, 'TResult>(IEnumerable<'TSource>, Func<'TSource, IEnumerable<'TResult>>)

Projects each element of a sequence to an IEnumerable<'T> and flattens the resulting sequences into one sequence.

System_CAPS_pubmethodSystem_CAPS_staticSelectMany<'TSource, 'TResult>(IEnumerable<'TSource>, Func<'TSource, Int32, IEnumerable<'TResult>>)

Projects each element of a sequence to an IEnumerable<'T>, and flattens the resulting sequences into one sequence. The index of each source element is used in the projected form of that element.

System_CAPS_pubmethodSystem_CAPS_staticSelectMany<'TSource, 'TCollection, 'TResult>(IEnumerable<'TSource>, Func<'TSource, IEnumerable<'TCollection>>, Func<'TSource, 'TCollection, 'TResult>)

Projects each element of a sequence to an IEnumerable<'T>, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein.

System_CAPS_pubmethodSystem_CAPS_staticSelectMany<'TSource, 'TCollection, 'TResult>(IEnumerable<'TSource>, Func<'TSource, Int32, IEnumerable<'TCollection>>, Func<'TSource, 'TCollection, 'TResult>)

Projects each element of a sequence to an IEnumerable<'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.

System_CAPS_pubmethodSystem_CAPS_staticSequenceEqual<'TSource>(IEnumerable<'TSource>, IEnumerable<'TSource>)

Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type.

System_CAPS_pubmethodSystem_CAPS_staticSequenceEqual<'TSource>(IEnumerable<'TSource>, IEnumerable<'TSource>, IEqualityComparer<'TSource>)

Determines whether two sequences are equal by comparing their elements by using a specified IEqualityComparer<'T>.

System_CAPS_pubmethodSystem_CAPS_staticSingle<'TSource>(IEnumerable<'TSource>)

Returns the only element of a sequence, and throws an exception if there is not exactly one element in the sequence.

System_CAPS_pubmethodSystem_CAPS_staticSingle<'TSource>(IEnumerable<'TSource>, Func<'TSource, Boolean>)

Returns the only element of a sequence that satisfies a specified condition, and throws an exception if more than one such element exists.

System_CAPS_pubmethodSystem_CAPS_staticSingleOrDefault<'TSource>(IEnumerable<'TSource>)

Returns the only element of a 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.

System_CAPS_pubmethodSystem_CAPS_staticSingleOrDefault<'TSource>(IEnumerable<'TSource>, Func<'TSource, Boolean>)

Returns the only element of a 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.

System_CAPS_pubmethodSystem_CAPS_staticSkip<'TSource>(IEnumerable<'TSource>, Int32)

Bypasses a specified number of elements in a sequence and then returns the remaining elements.

System_CAPS_pubmethodSystem_CAPS_staticSkipWhile<'TSource>(IEnumerable<'TSource>, Func<'TSource, Boolean>)

Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements.

System_CAPS_pubmethodSystem_CAPS_staticSkipWhile<'TSource>(IEnumerable<'TSource>, Func<'TSource, Int32, Boolean>)

Bypasses elements in a 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.

System_CAPS_pubmethodSystem_CAPS_staticSum(IEnumerable<Decimal>)

Computes the sum of a sequence of Decimal values.

System_CAPS_pubmethodSystem_CAPS_staticSum(IEnumerable<Double>)

Computes the sum of a sequence of Double values.

System_CAPS_pubmethodSystem_CAPS_staticSum(IEnumerable<Int32>)

Computes the sum of a sequence of Int32 values.

System_CAPS_pubmethodSystem_CAPS_staticSum(IEnumerable<Int64>)

Computes the sum of a sequence of Int64 values.

System_CAPS_pubmethodSystem_CAPS_staticSum(IEnumerable<Nullable<Decimal>>)

Computes the sum of a sequence of nullable Decimal values.

System_CAPS_pubmethodSystem_CAPS_staticSum(IEnumerable<Nullable<Double>>)

Computes the sum of a sequence of nullable Double values.

System_CAPS_pubmethodSystem_CAPS_staticSum(IEnumerable<Nullable<Int32>>)

Computes the sum of a sequence of nullable Int32 values.

System_CAPS_pubmethodSystem_CAPS_staticSum(IEnumerable<Nullable<Int64>>)

Computes the sum of a sequence of nullable Int64 values.

System_CAPS_pubmethodSystem_CAPS_staticSum(IEnumerable<Nullable<Single>>)

Computes the sum of a sequence of nullable Single values.

System_CAPS_pubmethodSystem_CAPS_staticSum(IEnumerable<Single>)

Computes the sum of a sequence of Single values.

System_CAPS_pubmethodSystem_CAPS_staticSum<'TSource>(IEnumerable<'TSource>, Func<'TSource, Decimal>)

Computes the sum of the sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticSum<'TSource>(IEnumerable<'TSource>, Func<'TSource, Double>)

Computes the sum of the sequence of Double values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticSum<'TSource>(IEnumerable<'TSource>, Func<'TSource, Int32>)

Computes the sum of the sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticSum<'TSource>(IEnumerable<'TSource>, Func<'TSource, Int64>)

Computes the sum of the sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticSum<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Decimal>>)

Computes the sum of the sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticSum<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Double>>)

Computes the sum of the sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticSum<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Int32>>)

Computes the sum of the sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticSum<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Int64>>)

Computes the sum of the sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticSum<'TSource>(IEnumerable<'TSource>, Func<'TSource, Nullable<Single>>)

Computes the sum of the sequence of nullable Single values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticSum<'TSource>(IEnumerable<'TSource>, Func<'TSource, Single>)

Computes the sum of the sequence of Single values that are obtained by invoking a transform function on each element of the input sequence.

System_CAPS_pubmethodSystem_CAPS_staticTake<'TSource>(IEnumerable<'TSource>, Int32)

Returns a specified number of contiguous elements from the start of a sequence.

System_CAPS_pubmethodSystem_CAPS_staticTakeWhile<'TSource>(IEnumerable<'TSource>, Func<'TSource, Boolean>)

Returns elements from a sequence as long as a specified condition is true.

System_CAPS_pubmethodSystem_CAPS_staticTakeWhile<'TSource>(IEnumerable<'TSource>, Func<'TSource, Int32, Boolean>)

Returns elements from a sequence as long as a specified condition is true. The element's index is used in the logic of the predicate function.

System_CAPS_pubmethodSystem_CAPS_staticThenBy<'TSource, 'TKey>(IOrderedEnumerable<'TSource>, Func<'TSource, 'TKey>)

Performs a subsequent ordering of the elements in a sequence in ascending order according to a key.

System_CAPS_pubmethodSystem_CAPS_staticThenBy<'TSource, 'TKey>(IOrderedEnumerable<'TSource>, Func<'TSource, 'TKey>, IComparer<'TKey>)

Performs a subsequent ordering of the elements in a sequence in ascending order by using a specified comparer.

System_CAPS_pubmethodSystem_CAPS_staticThenByDescending<'TSource, 'TKey>(IOrderedEnumerable<'TSource>, Func<'TSource, 'TKey>)

Performs a subsequent ordering of the elements in a sequence in descending order, according to a key.

System_CAPS_pubmethodSystem_CAPS_staticThenByDescending<'TSource, 'TKey>(IOrderedEnumerable<'TSource>, Func<'TSource, 'TKey>, IComparer<'TKey>)

Performs a subsequent ordering of the elements in a sequence in descending order by using a specified comparer.

System_CAPS_pubmethodSystem_CAPS_staticToArray<'TSource>(IEnumerable<'TSource>)

Creates an array from a IEnumerable<'T>.

System_CAPS_pubmethodSystem_CAPS_staticToDictionary<'TSource, 'TKey>(IEnumerable<'TSource>, Func<'TSource, 'TKey>)

Creates a Dictionary<'TKey, 'TValue> from an IEnumerable<'T> according to a specified key selector function.

System_CAPS_pubmethodSystem_CAPS_staticToDictionary<'TSource, 'TKey>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, IEqualityComparer<'TKey>)

Creates a Dictionary<'TKey, 'TValue> from an IEnumerable<'T> according to a specified key selector function and key comparer.

System_CAPS_pubmethodSystem_CAPS_staticToDictionary<'TSource, 'TKey, 'TElement>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, Func<'TSource, 'TElement>)

Creates a Dictionary<'TKey, 'TValue> from an IEnumerable<'T> according to specified key selector and element selector functions.

System_CAPS_pubmethodSystem_CAPS_staticToDictionary<'TSource, 'TKey, 'TElement>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, Func<'TSource, 'TElement>, IEqualityComparer<'TKey>)

Creates a Dictionary<'TKey, 'TValue> from an IEnumerable<'T> according to a specified key selector function, a comparer, and an element selector function.

System_CAPS_pubmethodSystem_CAPS_staticToList<'TSource>(IEnumerable<'TSource>)

Creates a List<'T> from an IEnumerable<'T>.

System_CAPS_pubmethodSystem_CAPS_staticToLookup<'TSource, 'TKey>(IEnumerable<'TSource>, Func<'TSource, 'TKey>)

Creates a Lookup<'TKey, 'TElement> from an IEnumerable<'T> according to a specified key selector function.

System_CAPS_pubmethodSystem_CAPS_staticToLookup<'TSource, 'TKey>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, IEqualityComparer<'TKey>)

Creates a Lookup<'TKey, 'TElement> from an IEnumerable<'T> according to a specified key selector function and key comparer.

System_CAPS_pubmethodSystem_CAPS_staticToLookup<'TSource, 'TKey, 'TElement>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, Func<'TSource, 'TElement>)

Creates a Lookup<'TKey, 'TElement> from an IEnumerable<'T> according to specified key selector and element selector functions.

System_CAPS_pubmethodSystem_CAPS_staticToLookup<'TSource, 'TKey, 'TElement>(IEnumerable<'TSource>, Func<'TSource, 'TKey>, Func<'TSource, 'TElement>, IEqualityComparer<'TKey>)

Creates a Lookup<'TKey, 'TElement> from an IEnumerable<'T> according to a specified key selector function, a comparer and an element selector function.

System_CAPS_pubmethodSystem_CAPS_staticUnion<'TSource>(IEnumerable<'TSource>, IEnumerable<'TSource>)

Produces the set union of two sequences by using the default equality comparer.

System_CAPS_pubmethodSystem_CAPS_staticUnion<'TSource>(IEnumerable<'TSource>, IEnumerable<'TSource>, IEqualityComparer<'TSource>)

Produces the set union of two sequences by using a specified IEqualityComparer<'T>.

System_CAPS_pubmethodSystem_CAPS_staticWhere<'TSource>(IEnumerable<'TSource>, Func<'TSource, Boolean>)

Filters a sequence of values based on a predicate.

System_CAPS_pubmethodSystem_CAPS_staticWhere<'TSource>(IEnumerable<'TSource>, Func<'TSource, Int32, Boolean>)

Filters a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function.

System_CAPS_pubmethodSystem_CAPS_staticZip<'TFirst, 'TSecond, 'TResult>(IEnumerable<'TFirst>, IEnumerable<'TSecond>, Func<'TFirst, 'TSecond, 'TResult>)

Applies a specified function to the corresponding elements of two sequences, producing a sequence of the results.

The methods in this class provide an implementation of the standard query operators for querying data sources that implement IEnumerable<'T>. The standard query operators are general purpose methods that follow the LINQ pattern and enable you to express traversal, filter, and projection operations over data in any .NET-based programming language.

The majority of the methods in this class are defined as extension methods that extend IEnumerable<'T>. This means they can be called like an instance method on any object that implements IEnumerable<'T>.

Methods that are used in a query that returns a sequence of values do not consume the target data until the query object is enumerated. This is known as deferred execution. Methods that are used in a query that returns a singleton value execute and consume the target data immediately.

Universal Windows Platform
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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