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.NET Framework 3.5
Queryable Class
Queryable Methods
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.NET Framework Class Library
Queryable Methods

Updated: November 2007

The Queryable type exposes the following members.

  NameDescription
AggregateOverloaded. Applies an accumulator function over a sequence.
All<(Of <(TSource>)>) Determines whether all the elements of a sequence satisfy a condition.
AnyOverloaded. Determines whether any element of an IQueryable<(Of <(T>)>) sequence exists or satisfies a condition.
AsQueryableOverloaded. Converts an IEnumerable or generic IEnumerable<(Of <(T>)>) to an IQueryable or generic IQueryable<(Of <(T>)>).
AverageOverloaded. Computes the average of a sequence of numeric values.
Cast<(Of <(TResult>)>) Converts the elements of an IQueryable to the specified type.
Concat<(Of <(TSource>)>) Concatenates two sequences.
ContainsOverloaded. Determines whether an IQueryable<(Of <(T>)>) contains a specified element.
CountOverloaded. Returns the number of elements in a sequence.
DefaultIfEmptyOverloaded. Returns the elements in a sequence or a default valued singleton collection if the sequence is empty.
DistinctOverloaded. Returns distinct elements from a sequence.
ElementAt<(Of <(TSource>)>) Returns the element at a specified index in a sequence.
ElementAtOrDefault<(Of <(TSource>)>) Returns the element at a specified index in a sequence or a default value if the index is out of range.
ExceptOverloaded. Produces the set difference of two sequences.
FirstOverloaded. Returns the first element of a sequence.
FirstOrDefaultOverloaded. Returns the first element of a sequence, or a default value if no element is found.
GroupByOverloaded. Groups the elements of a sequence.
GroupJoinOverloaded. Correlates the elements of two sequences based on key equality and groups the results.
IntersectOverloaded. Produces the set intersection of two sequences.
JoinOverloaded. Correlates the elements of two sequences based on matching keys.
LastOverloaded. Returns the last element in a sequence.
LastOrDefaultOverloaded. Returns the last element of a sequence, or a default value if no element is found.
LongCountOverloaded. Returns an Int64 that represents the number of elements in sequence.
MaxOverloaded. Returns the maximum value in a sequence.
MinOverloaded. Returns the minimum value in a sequence.
OfType<(Of <(TResult>)>) Filters the elements of an IQueryable based on a specified type.
OrderByOverloaded. Sorts the elements of a sequence in ascending order.
OrderByDescendingOverloaded. Sorts the elements of a sequence in descending order.
Reverse<(Of <(TSource>)>) Inverts the order of the elements in a sequence.
SelectOverloaded. Projects each element of a sequence into a new form.
SelectManyOverloaded. Projects each element of a sequence to an IEnumerable<(Of <(T>)>) and combines the resulting sequences into one sequence of type IQueryable<(Of <(T>)>).
SequenceEqualOverloaded. Determines whether two sequences are equal.
SingleOverloaded. Returns a single, specific element of a sequence.
SingleOrDefaultOverloaded. Returns a single, specific element of a sequence, or a default value if no such element is found.
Skip<(Of <(TSource>)>) Bypasses a specified number of elements in a sequence and then returns the remaining elements.
SkipWhileOverloaded. Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements.
SumOverloaded. Computes the sum of a sequence of numeric values.
Take<(Of <(TSource>)>) Returns a specified number of contiguous elements from the start of a sequence.
TakeWhileOverloaded. Returns elements from a sequence as long as a specified condition is true, and then skips the remaining elements.
ThenByOverloaded. Performs a subsequent ordering of the elements in a sequence in ascending order.
ThenByDescendingOverloaded. Performs a subsequent ordering of the elements in a sequence in descending order.
UnionOverloaded. Produces the set union of two sequences.
WhereOverloaded. Filters a sequence of values based on a predicate.
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