Enumerable Class
Definition
Important
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Provides a set of static (Shared in Visual Basic) methods for querying objects that implement IEnumerable<T>.
public ref class Enumerable abstract sealedpublic static class Enumerabletype Enumerable = classPublic Module Enumerable- Inheritance
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Enumerable
Remarks
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.
Methods
| Aggregate<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. |
| Aggregate<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. |
| Aggregate<TSource>(IEnumerable<TSource>, Func<TSource,TSource,TSource>) |
Applies an accumulator function over a sequence. |
| AggregateBy<TSource,TKey,TAccumulate>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TKey,TAccumulate>, Func<TAccumulate,TSource,TAccumulate>, IEqualityComparer<TKey>) | |
| AggregateBy<TSource,TKey,TAccumulate>(IEnumerable<TSource>, Func<TSource, TKey>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>, IEqualityComparer<TKey>) | |
| All<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Determines whether all elements of a sequence satisfy a condition. |
| Any<TSource>(IEnumerable<TSource>) |
Determines whether a sequence contains any elements. |
| Any<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Determines whether any element of a sequence satisfies a condition. |
| Append<TSource>(IEnumerable<TSource>, TSource) |
Appends a value to the end of the sequence. |
| AsEnumerable<TSource>(IEnumerable<TSource>) |
Returns the input typed as IEnumerable<T>. |
| Average(IEnumerable<Decimal>) |
Computes the average of a sequence of Decimal values. |
| Average(IEnumerable<Double>) |
Computes the average of a sequence of Double values. |
| Average(IEnumerable<Int32>) |
Computes the average of a sequence of Int32 values. |
| Average(IEnumerable<Int64>) |
Computes the average of a sequence of Int64 values. |
| Average(IEnumerable<Nullable<Decimal>>) |
Computes the average of a sequence of nullable Decimal values. |
| Average(IEnumerable<Nullable<Double>>) |
Computes the average of a sequence of nullable Double values. |
| Average(IEnumerable<Nullable<Int32>>) |
Computes the average of a sequence of nullable Int32 values. |
| Average(IEnumerable<Nullable<Int64>>) |
Computes the average of a sequence of nullable Int64 values. |
| Average(IEnumerable<Nullable<Single>>) |
Computes the average of a sequence of nullable Single values. |
| Average(IEnumerable<Single>) |
Computes the average of a sequence of Single values. |
| Average<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. |
| Average<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. |
| Average<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. |
| Average<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. |
| Average<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. |
| Average<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. |
| Average<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. |
| Average<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. |
| Average<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. |
| Average<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. |
| Cast<TResult>(IEnumerable) |
Casts the elements of an IEnumerable to the specified type. |
| Chunk<TSource>(IEnumerable<TSource>, Int32) |
Splits the elements of a sequence into chunks of size at most |
| Concat<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Concatenates two sequences. |
| Contains<TSource>(IEnumerable<TSource>, TSource) |
Determines whether a sequence contains a specified element by using the default equality comparer. |
| Contains<TSource>(IEnumerable<TSource>, TSource, IEqualityComparer<TSource>) |
Determines whether a sequence contains a specified element by using a specified IEqualityComparer<T>. |
| Count<TSource>(IEnumerable<TSource>) |
Returns the number of elements in a sequence. |
| Count<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns a number that represents how many elements in the specified sequence satisfy a condition. |
| CountBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) | |
| DefaultIfEmpty<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. |
| DefaultIfEmpty<TSource>(IEnumerable<TSource>, TSource) |
Returns the elements of the specified sequence or the specified value in a singleton collection if the sequence is empty. |
| Distinct<TSource>(IEnumerable<TSource>) |
Returns distinct elements from a sequence by using the default equality comparer to compare values. |
| Distinct<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) |
Returns distinct elements from a sequence by using a specified IEqualityComparer<T> to compare values. |
| DistinctBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Returns distinct elements from a sequence according to a specified key selector function. |
| DistinctBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Returns distinct elements from a sequence according to a specified key selector function and using a specified comparer to compare keys. |
| ElementAt<TSource>(IEnumerable<TSource>, Index) |
Returns the element at a specified index in a sequence. |
| ElementAt<TSource>(IEnumerable<TSource>, Int32) |
Returns the element at a specified index in a sequence. |
| ElementAtOrDefault<TSource>(IEnumerable<TSource>, Index) |
Returns the element at a specified index in a sequence or a default value if the index is out of range. |
| ElementAtOrDefault<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. |
| Empty<TResult>() |
Returns an empty IEnumerable<T> that has the specified type argument. |
| Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Produces the set difference of two sequences by using the default equality comparer to compare values. |
| Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) |
Produces the set difference of two sequences by using the specified IEqualityComparer<T> to compare values. |
| ExceptBy<TSource,TKey>(IEnumerable<TSource>, IEnumerable<TKey>, Func<TSource,TKey>) |
Produces the set difference of two sequences according to a specified key selector function. |
| ExceptBy<TSource,TKey>(IEnumerable<TSource>, IEnumerable<TKey>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Produces the set difference of two sequences according to a specified key selector function. |
| First<TSource>(IEnumerable<TSource>) |
Returns the first element of a sequence. |
| First<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns the first element in a sequence that satisfies a specified condition. |
| FirstOrDefault<TSource>(IEnumerable<TSource>) |
Returns the first element of a sequence, or a default value if the sequence contains no elements. |
| FirstOrDefault<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. |
| FirstOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>, TSource) |
Returns the first element of the sequence that satisfies a condition, or a specified default value if no such element is found. |
| FirstOrDefault<TSource>(IEnumerable<TSource>, TSource) |
Returns the first element of a sequence, or a specified default value if the sequence contains no elements. |
| GroupBy<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. |
| GroupBy<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. |
| GroupBy<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. |
| GroupBy<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. |
| GroupBy<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. |
| GroupBy<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. |
| GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Groups the elements of a sequence according to a specified key selector function. |
| GroupBy<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. |
| GroupJoin<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. |
| GroupJoin<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. |
| Index<TSource>(IEnumerable<TSource>) | |
| Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Produces the set intersection of two sequences by using the default equality comparer to compare values. |
| Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) |
Produces the set intersection of two sequences by using the specified IEqualityComparer<T> to compare values. |
| IntersectBy<TSource,TKey>(IEnumerable<TSource>, IEnumerable<TKey>, Func<TSource,TKey>) |
Produces the set intersection of two sequences according to a specified key selector function. |
| IntersectBy<TSource,TKey>(IEnumerable<TSource>, IEnumerable<TKey>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Produces the set intersection of two sequences according to a specified key selector function. |
| Join<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. |
| Join<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. |
| Last<TSource>(IEnumerable<TSource>) |
Returns the last element of a sequence. |
| Last<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns the last element of a sequence that satisfies a specified condition. |
| LastOrDefault<TSource>(IEnumerable<TSource>) |
Returns the last element of a sequence, or a default value if the sequence contains no elements. |
| LastOrDefault<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. |
| LastOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>, TSource) |
Returns the last element of a sequence that satisfies a condition, or a specified default value if no such element is found. |
| LastOrDefault<TSource>(IEnumerable<TSource>, TSource) |
Returns the last element of a sequence, or a specified default value if the sequence contains no elements. |
| LongCount<TSource>(IEnumerable<TSource>) |
Returns an Int64 that represents the total number of elements in a sequence. |
| LongCount<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns an Int64 that represents how many elements in a sequence satisfy a condition. |
| Max(IEnumerable<Decimal>) |
Returns the maximum value in a sequence of Decimal values. |
| Max(IEnumerable<Double>) |
Returns the maximum value in a sequence of Double values. |
| Max(IEnumerable<Int32>) |
Returns the maximum value in a sequence of Int32 values. |
| Max(IEnumerable<Int64>) |
Returns the maximum value in a sequence of Int64 values. |
| Max(IEnumerable<Nullable<Decimal>>) |
Returns the maximum value in a sequence of nullable Decimal values. |
| Max(IEnumerable<Nullable<Double>>) |
Returns the maximum value in a sequence of nullable Double values. |
| Max(IEnumerable<Nullable<Int32>>) |
Returns the maximum value in a sequence of nullable Int32 values. |
| Max(IEnumerable<Nullable<Int64>>) |
Returns the maximum value in a sequence of nullable Int64 values. |
| Max(IEnumerable<Nullable<Single>>) |
Returns the maximum value in a sequence of nullable Single values. |
| Max(IEnumerable<Single>) |
Returns the maximum value in a sequence of Single values. |
| Max<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) |
Invokes a transform function on each element of a generic sequence and returns the maximum resulting value. |
| Max<TSource>(IEnumerable<TSource>) |
Returns the maximum value in a generic sequence. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) |
Invokes a transform function on each element of a sequence and returns the maximum Decimal value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Double>) |
Invokes a transform function on each element of a sequence and returns the maximum Double value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) |
Invokes a transform function on each element of a sequence and returns the maximum Int32 value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) |
Invokes a transform function on each element of a sequence and returns the maximum Int64 value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Decimal value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Double value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Int32 value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Int64 value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Single value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Single>) |
Invokes a transform function on each element of a sequence and returns the maximum Single value. |
| Max<TSource>(IEnumerable<TSource>, IComparer<TSource>) |
Returns the maximum value in a generic sequence. |
| MaxBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Returns the maximum value in a generic sequence according to a specified key selector function. |
| MaxBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) |
Returns the maximum value in a generic sequence according to a specified key selector function and key comparer. |
| Min(IEnumerable<Decimal>) |
Returns the minimum value in a sequence of Decimal values. |
| Min(IEnumerable<Double>) |
Returns the minimum value in a sequence of Double values. |
| Min(IEnumerable<Int32>) |
Returns the minimum value in a sequence of Int32 values. |
| Min(IEnumerable<Int64>) |
Returns the minimum value in a sequence of Int64 values. |
| Min(IEnumerable<Nullable<Decimal>>) |
Returns the minimum value in a sequence of nullable Decimal values. |
| Min(IEnumerable<Nullable<Double>>) |
Returns the minimum value in a sequence of nullable Double values. |
| Min(IEnumerable<Nullable<Int32>>) |
Returns the minimum value in a sequence of nullable Int32 values. |
| Min(IEnumerable<Nullable<Int64>>) |
Returns the minimum value in a sequence of nullable Int64 values. |
| Min(IEnumerable<Nullable<Single>>) |
Returns the minimum value in a sequence of nullable Single values. |
| Min(IEnumerable<Single>) |
Returns the minimum value in a sequence of Single values. |
| Min<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) |
Invokes a transform function on each element of a generic sequence and returns the minimum resulting value. |
| Min<TSource>(IEnumerable<TSource>) |
Returns the minimum value in a generic sequence. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) |
Invokes a transform function on each element of a sequence and returns the minimum Decimal value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Double>) |
Invokes a transform function on each element of a sequence and returns the minimum Double value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) |
Invokes a transform function on each element of a sequence and returns the minimum Int32 value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) |
Invokes a transform function on each element of a sequence and returns the minimum Int64 value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Decimal value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Double value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Int32 value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Int64 value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Single value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Single>) |
Invokes a transform function on each element of a sequence and returns the minimum Single value. |
| Min<TSource>(IEnumerable<TSource>, IComparer<TSource>) |
Returns the minimum value in a generic sequence. |
| MinBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Returns the minimum value in a generic sequence according to a specified key selector function. |
| MinBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) |
Returns the minimum value in a generic sequence according to a specified key selector function and key comparer. |
| OfType<TResult>(IEnumerable) |
Filters the elements of an IEnumerable based on a specified type. |
| Order<T>(IEnumerable<T>) |
Sorts the elements of a sequence in ascending order. |
| Order<T>(IEnumerable<T>, IComparer<T>) |
Sorts the elements of a sequence in ascending order. |
| OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Sorts the elements of a sequence in ascending order according to a key. |
| OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) |
Sorts the elements of a sequence in ascending order by using a specified comparer. |
| OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Sorts the elements of a sequence in descending order according to a key. |
| OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) |
Sorts the elements of a sequence in descending order by using a specified comparer. |
| OrderDescending<T>(IEnumerable<T>) |
Sorts the elements of a sequence in descending order. |
| OrderDescending<T>(IEnumerable<T>, IComparer<T>) |
Sorts the elements of a sequence in descending order. |
| Prepend<TSource>(IEnumerable<TSource>, TSource) |
Adds a value to the beginning of the sequence. |
| Range(Int32, Int32) |
Generates a sequence of integral numbers within a specified range. |
| Repeat<TResult>(TResult, Int32) |
Generates a sequence that contains one repeated value. |
| Reverse<TSource>(IEnumerable<TSource>) |
Inverts the order of the elements in a sequence. |
| Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,TResult>) |
Projects each element of a sequence into a new form by incorporating the element's index. |
| Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) |
Projects each element of a sequence into a new form. |
| SelectMany<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. |
| SelectMany<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. |
| SelectMany<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. |
| SelectMany<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. |
| SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type. |
| SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) |
Determines whether two sequences are equal by comparing their elements by using a specified IEqualityComparer<T>. |
| Single<TSource>(IEnumerable<TSource>) |
Returns the only element of a sequence, and throws an exception if there is not exactly one element in the sequence. |
| Single<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. |
| SingleOrDefault<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. |
| SingleOrDefault<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. |
| SingleOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>, TSource) |
Returns the only element of a sequence that satisfies a specified condition, or a specified default value if no such element exists; this method throws an exception if more than one element satisfies the condition. |
| SingleOrDefault<TSource>(IEnumerable<TSource>, TSource) |
Returns the only element of a sequence, or a specified default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence. |
| Skip<TSource>(IEnumerable<TSource>, Int32) |
Bypasses a specified number of elements in a sequence and then returns the remaining elements. |
| SkipLast<TSource>(IEnumerable<TSource>, Int32) |
Returns a new enumerable collection that contains the elements from |
| SkipWhile<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. |
| SkipWhile<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. |
| Sum(IEnumerable<Decimal>) |
Computes the sum of a sequence of Decimal values. |
| Sum(IEnumerable<Double>) |
Computes the sum of a sequence of Double values. |
| Sum(IEnumerable<Int32>) |
Computes the sum of a sequence of Int32 values. |
| Sum(IEnumerable<Int64>) |
Computes the sum of a sequence of Int64 values. |
| Sum(IEnumerable<Nullable<Decimal>>) |
Computes the sum of a sequence of nullable Decimal values. |
| Sum(IEnumerable<Nullable<Double>>) |
Computes the sum of a sequence of nullable Double values. |
| Sum(IEnumerable<Nullable<Int32>>) |
Computes the sum of a sequence of nullable Int32 values. |
| Sum(IEnumerable<Nullable<Int64>>) |
Computes the sum of a sequence of nullable Int64 values. |
| Sum(IEnumerable<Nullable<Single>>) |
Computes the sum of a sequence of nullable Single values. |
| Sum(IEnumerable<Single>) |
Computes the sum of a sequence of Single values. |
| Sum<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. |
| Sum<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. |
| Sum<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. |
| Sum<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. |
| Sum<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. |
| Sum<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. |
| Sum<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. |
| Sum<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. |
| Sum<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. |
| Sum<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. |
| Take<TSource>(IEnumerable<TSource>, Int32) |
Returns a specified number of contiguous elements from the start of a sequence. |
| Take<TSource>(IEnumerable<TSource>, Range) |
Returns a specified range of contiguous elements from a sequence. |
| TakeLast<TSource>(IEnumerable<TSource>, Int32) |
Returns a new enumerable collection that contains the last |
| TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns elements from a sequence as long as a specified condition is true. |
| TakeWhile<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. |
| ThenBy<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>) |
Performs a subsequent ordering of the elements in a sequence in ascending order according to a key. |
| ThenBy<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. |
| ThenByDescending<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>) |
Performs a subsequent ordering of the elements in a sequence in descending order, according to a key. |
| ThenByDescending<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. |
| ToArray<TSource>(IEnumerable<TSource>) |
Creates an array from a IEnumerable<T>. |
| ToDictionary<TKey,TValue>(IEnumerable<KeyValuePair<TKey,TValue>>) |
Creates a dictionary from an enumeration according to the default comparer for the key type. |
| ToDictionary<TKey,TValue>(IEnumerable<KeyValuePair<TKey,TValue>>, IEqualityComparer<TKey>) |
Creates a dictionary from an enumeration according to specified key comparer. |
| ToDictionary<TKey,TValue>(IEnumerable<ValueTuple<TKey,TValue>>) |
Creates a dictionary from an enumeration according to the default comparer for the key type. |
| ToDictionary<TKey,TValue>(IEnumerable<ValueTuple<TKey,TValue>>, IEqualityComparer<TKey>) |
Creates a dictionary from an enumeration according to specified key equality comparer. |
| ToDictionary<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. |
| ToDictionary<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. |
| ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to a specified key selector function. |
| ToDictionary<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. |
| ToHashSet<TSource>(IEnumerable<TSource>) |
Creates a HashSet<T> from an IEnumerable<T>. |
| ToHashSet<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) |
Creates a HashSet<T> from an IEnumerable<T> using the |
| ToList<TSource>(IEnumerable<TSource>) |
Creates a List<T> from an IEnumerable<T>. |
| ToLookup<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. |
| ToLookup<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. |
| ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to a specified key selector function. |
| ToLookup<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. |
| TryGetNonEnumeratedCount<TSource>(IEnumerable<TSource>, Int32) |
Attempts to determine the number of elements in a sequence without forcing an enumeration. |
| Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Produces the set union of two sequences by using the default equality comparer. |
| Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) |
Produces the set union of two sequences by using a specified IEqualityComparer<T>. |
| UnionBy<TSource,TKey>(IEnumerable<TSource>, IEnumerable<TSource>, Func<TSource,TKey>) |
Produces the set union of two sequences according to a specified key selector function. |
| UnionBy<TSource,TKey>(IEnumerable<TSource>, IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Produces the set union of two sequences according to a specified key selector function. |
| Where<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Filters a sequence of values based on a predicate. |
| Where<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. |
| Zip<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. |
| Zip<TFirst,TSecond,TThird>(IEnumerable<TFirst>, IEnumerable<TSecond>, IEnumerable<TThird>) |
Produces a sequence of tuples with elements from the three specified sequences. |
| Zip<TFirst,TSecond>(IEnumerable<TFirst>, IEnumerable<TSecond>) |
Produces a sequence of tuples with elements from the two specified sequences. |
Applies to
See also
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