Enumerable
Aggregate<TSource>(IEnumerable<TSource>, Func<TSource, TSource, TSource>)- Aggregate<TSource, TAccumulate>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate, TSource, TAccumulate>)
- Aggregate<TSource, TAccumulate, TResult>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate, TSource, TAccumulate>, Func<TAccumulate, TResult>)
- AggregateBy<TSource, TKey, TAccumulate>(IEnumerable<TSource>, Func<TSource, TKey>, TAccumulate, Func<TAccumulate, TSource, TAccumulate>, IEqualityComparer<TKey>)
- AggregateBy<TSource, TKey, TAccumulate>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TKey, TAccumulate>, Func<TAccumulate, TSource, TAccumulate>, IEqualityComparer<TKey>)
- All<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)
- Any<TSource>(IEnumerable<TSource>)
- Any<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)
- Append<TSource>(IEnumerable<TSource>, TSource)
- AsEnumerable<TSource>(IEnumerable<TSource>)
- Average(IEnumerable<Decimal?>)
- Average(IEnumerable<Decimal>)
- Average(IEnumerable<Double?>)
- Average(IEnumerable<Double>)
- Average(IEnumerable<Int32?>)
- Average(IEnumerable<Int32>)
- Average(IEnumerable<Int64?>)
- Average(IEnumerable<Int64>)
- Average(IEnumerable<Single?>)
- Average(IEnumerable<Single>)
- Average<TSource>(IEnumerable<TSource>, Func<TSource, Decimal?>)
- Average<TSource>(IEnumerable<TSource>, Func<TSource, Decimal>)
- Average<TSource>(IEnumerable<TSource>, Func<TSource, Double?>)
- Average<TSource>(IEnumerable<TSource>, Func<TSource, Double>)
- Average<TSource>(IEnumerable<TSource>, Func<TSource, Int32?>)
- Average<TSource>(IEnumerable<TSource>, Func<TSource, Int32>)
- Average<TSource>(IEnumerable<TSource>, Func<TSource, Int64?>)
- Average<TSource>(IEnumerable<TSource>, Func<TSource, Int64>)
- Average<TSource>(IEnumerable<TSource>, Func<TSource, Single?>)
- Average<TSource>(IEnumerable<TSource>, Func<TSource, Single>)
- Cast<TResult>(IEnumerable)
- Chunk<TSource>(IEnumerable<TSource>, Int32)
- Concat<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)
- Contains<TSource>(IEnumerable<TSource>, TSource)
- Contains<TSource>(IEnumerable<TSource>, TSource, IEqualityComparer<TSource>)
- Count<TSource>(IEnumerable<TSource>)
- Count<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)
- CountBy<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>, IEqualityComparer<TKey>)
- DefaultIfEmpty<TSource>(IEnumerable<TSource>)
- DefaultIfEmpty<TSource>(IEnumerable<TSource>, TSource)
- Distinct<TSource>(IEnumerable<TSource>)
- Distinct<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>)
- DistinctBy<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>)
- DistinctBy<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>, IEqualityComparer<TKey>)
- ElementAt<TSource>(IEnumerable<TSource>, Index)
- ElementAt<TSource>(IEnumerable<TSource>, Int32)
- ElementAtOrDefault<TSource>(IEnumerable<TSource>, Index)
- ElementAtOrDefault<TSource>(IEnumerable<TSource>, Int32)
- Empty<TResult>()
- Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)
- Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)
- ExceptBy<TSource, TKey>(IEnumerable<TSource>, IEnumerable<TKey>, Func<TSource, TKey>)
- ExceptBy<TSource, TKey>(IEnumerable<TSource>, IEnumerable<TKey>, Func<TSource, TKey>, IEqualityComparer<TKey>)
- First<TSource>(IEnumerable<TSource>)
- First<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)
- FirstOrDefault<TSource>(IEnumerable<TSource>)
- FirstOrDefault<TSource>(IEnumerable<TSource>, TSource)
- FirstOrDefault<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)
- FirstOrDefault<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>, TSource)
- GroupBy<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>)
- GroupBy<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>, IEqualityComparer<TKey>)
- GroupBy<TSource, TKey, TElement>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TSource, TElement>)
- GroupBy<TSource, TKey, TElement>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TSource, TElement>, IEqualityComparer<TKey>)
- GroupBy<TSource, TKey, TResult>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TKey, IEnumerable<TSource>, TResult>)
- GroupBy<TSource, TKey, TResult>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TKey, IEnumerable<TSource>, TResult>, IEqualityComparer<TKey>)
- GroupBy<TSource, TKey, TElement, TResult>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TSource, TElement>, Func<TKey, IEnumerable<TElement>, TResult>)
- GroupBy<TSource, TKey, TElement, TResult>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TSource, TElement>, Func<TKey, IEnumerable<TElement>, TResult>, IEqualityComparer<TKey>)
- GroupJoin<TOuter, TInner, TKey, TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter, TKey>, Func<TInner, TKey>, Func<TOuter, IEnumerable<TInner>, TResult>)
- GroupJoin<TOuter, TInner, TKey, TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter, TKey>, Func<TInner, TKey>, Func<TOuter, IEnumerable<TInner>, TResult>, IEqualityComparer<TKey>)
- Index<TSource>(IEnumerable<TSource>)
- Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)
- Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)
- IntersectBy<TSource, TKey>(IEnumerable<TSource>, IEnumerable<TKey>, Func<TSource, TKey>)
- IntersectBy<TSource, TKey>(IEnumerable<TSource>, IEnumerable<TKey>, Func<TSource, TKey>, IEqualityComparer<TKey>)
- Join<TOuter, TInner, TKey, TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter, TKey>, Func<TInner, TKey>, Func<TOuter, TInner, TResult>)
- Join<TOuter, TInner, TKey, TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter, TKey>, Func<TInner, TKey>, Func<TOuter, TInner, TResult>, IEqualityComparer<TKey>)
- Last<TSource>(IEnumerable<TSource>)
- Last<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)
- LastOrDefault<TSource>(IEnumerable<TSource>)
- LastOrDefault<TSource>(IEnumerable<TSource>, TSource)
- LastOrDefault<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)
- LastOrDefault<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>, TSource)
- LongCount<TSource>(IEnumerable<TSource>)
- LongCount<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)
- Max(IEnumerable<Decimal?>)
- Max(IEnumerable<Decimal>)
- Max(IEnumerable<Double?>)
- Max(IEnumerable<Double>)
- Max(IEnumerable<Int32?>)
- Max(IEnumerable<Int32>)
- Max(IEnumerable<Int64?>)
- Max(IEnumerable<Int64>)
- Max(IEnumerable<Single?>)
- Max(IEnumerable<Single>)
- Max<TSource>(IEnumerable<TSource>)
- Max<TSource>(IEnumerable<TSource>, IComparer<TSource>)
- Max<TSource>(IEnumerable<TSource>, Func<TSource, Decimal?>)
- Max<TSource>(IEnumerable<TSource>, Func<TSource, Decimal>)
- Max<TSource>(IEnumerable<TSource>, Func<TSource, Double?>)
- Max<TSource>(IEnumerable<TSource>, Func<TSource, Double>)
- Max<TSource>(IEnumerable<TSource>, Func<TSource, Int32?>)
- Max<TSource>(IEnumerable<TSource>, Func<TSource, Int32>)
- Max<TSource>(IEnumerable<TSource>, Func<TSource, Int64?>)
- Max<TSource>(IEnumerable<TSource>, Func<TSource, Int64>)
- Max<TSource>(IEnumerable<TSource>, Func<TSource, Single?>)
- Max<TSource>(IEnumerable<TSource>, Func<TSource, Single>)
- Max<TSource, TResult>(IEnumerable<TSource>, Func<TSource, TResult>)
- MaxBy<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>)
- MaxBy<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>, IComparer<TKey>)
- Min(IEnumerable<Decimal?>)
- Min(IEnumerable<Decimal>)
- Min(IEnumerable<Double?>)
- Min(IEnumerable<Double>)
- Min(IEnumerable<Int32?>)
- Min(IEnumerable<Int32>)
- Min(IEnumerable<Int64?>)
- Min(IEnumerable<Int64>)
- Min(IEnumerable<Single?>)
- Min(IEnumerable<Single>)
- Min<TSource>(IEnumerable<TSource>)
- Min<TSource>(IEnumerable<TSource>, IComparer<TSource>)
- Min<TSource>(IEnumerable<TSource>, Func<TSource, Decimal?>)
- Min<TSource>(IEnumerable<TSource>, Func<TSource, Decimal>)
- Min<TSource>(IEnumerable<TSource>, Func<TSource, Double?>)
- Min<TSource>(IEnumerable<TSource>, Func<TSource, Double>)
- Min<TSource>(IEnumerable<TSource>, Func<TSource, Int32?>)
- Min<TSource>(IEnumerable<TSource>, Func<TSource, Int32>)
- Min<TSource>(IEnumerable<TSource>, Func<TSource, Int64?>)
- Min<TSource>(IEnumerable<TSource>, Func<TSource, Int64>)
- Min<TSource>(IEnumerable<TSource>, Func<TSource, Single?>)
- Min<TSource>(IEnumerable<TSource>, Func<TSource, Single>)
- Min<TSource, TResult>(IEnumerable<TSource>, Func<TSource, TResult>)
- MinBy<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>)
- MinBy<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>, IComparer<TKey>)
- OfType<TResult>(IEnumerable)
- Order<T>(IEnumerable<T>)
- Order<T>(IEnumerable<T>, IComparer<T>)
- OrderBy<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>)
- OrderBy<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>, IComparer<TKey>)
- OrderByDescending<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>)
- OrderByDescending<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>, IComparer<TKey>)
- OrderDescending<T>(IEnumerable<T>)
- OrderDescending<T>(IEnumerable<T>, IComparer<T>)
- Prepend<TSource>(IEnumerable<TSource>, TSource)
- Range(Int32, Int32)
- Repeat<TResult>(TResult, Int32)
- Reverse<TSource>(IEnumerable<TSource>)
- Select<TSource, TResult>(IEnumerable<TSource>, Func<TSource, TResult>)
- Select<TSource, TResult>(IEnumerable<TSource>, Func<TSource, Int32, TResult>)
- SelectMany<TSource, TResult>(IEnumerable<TSource>, Func<TSource, IEnumerable<TResult>>)
- SelectMany<TSource, TResult>(IEnumerable<TSource>, Func<TSource, Int32, IEnumerable<TResult>>)
- SelectMany<TSource, TCollection, TResult>(IEnumerable<TSource>, Func<TSource, IEnumerable<TCollection>>, Func<TSource, TCollection, TResult>)
- SelectMany<TSource, TCollection, TResult>(IEnumerable<TSource>, Func<TSource, Int32, IEnumerable<TCollection>>, Func<TSource, TCollection, TResult>)
- SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)
- SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)
- Single<TSource>(IEnumerable<TSource>)
- Single<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)
- SingleOrDefault<TSource>(IEnumerable<TSource>)
- SingleOrDefault<TSource>(IEnumerable<TSource>, TSource)
- SingleOrDefault<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)
- SingleOrDefault<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>, TSource)
- Skip<TSource>(IEnumerable<TSource>, Int32)
- SkipLast<TSource>(IEnumerable<TSource>, Int32)
- SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)
- SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource, Int32, Boolean>)
- Sum(IEnumerable<Decimal?>)
- Sum(IEnumerable<Decimal>)
- Sum(IEnumerable<Double?>)
- Sum(IEnumerable<Double>)
- Sum(IEnumerable<Int32?>)
- Sum(IEnumerable<Int32>)
- Sum(IEnumerable<Int64?>)
- Sum(IEnumerable<Int64>)
- Sum(IEnumerable<Single?>)
- Sum(IEnumerable<Single>)
- Sum<TSource>(IEnumerable<TSource>, Func<TSource, Decimal?>)
- Sum<TSource>(IEnumerable<TSource>, Func<TSource, Decimal>)
- Sum<TSource>(IEnumerable<TSource>, Func<TSource, Double?>)
- Sum<TSource>(IEnumerable<TSource>, Func<TSource, Double>)
- Sum<TSource>(IEnumerable<TSource>, Func<TSource, Int32?>)
- Sum<TSource>(IEnumerable<TSource>, Func<TSource, Int32>)
- Sum<TSource>(IEnumerable<TSource>, Func<TSource, Int64?>)
- Sum<TSource>(IEnumerable<TSource>, Func<TSource, Int64>)
- Sum<TSource>(IEnumerable<TSource>, Func<TSource, Single?>)
- Sum<TSource>(IEnumerable<TSource>, Func<TSource, Single>)
- Take<TSource>(IEnumerable<TSource>, Int32)
- Take<TSource>(IEnumerable<TSource>, Range)
- TakeLast<TSource>(IEnumerable<TSource>, Int32)
- TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)
- TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource, Int32, Boolean>)
- ThenBy<TSource, TKey>(IOrderedEnumerable<TSource>, Func<TSource, TKey>)
- ThenBy<TSource, TKey>(IOrderedEnumerable<TSource>, Func<TSource, TKey>, IComparer<TKey>)
- ThenByDescending<TSource, TKey>(IOrderedEnumerable<TSource>, Func<TSource, TKey>)
- ThenByDescending<TSource, TKey>(IOrderedEnumerable<TSource>, Func<TSource, TKey>, IComparer<TKey>)
- ToArray<TSource>(IEnumerable<TSource>)
- ToDictionary<TKey, TValue>(IEnumerable<(TKey Key, TValue Value)>, IEqualityComparer<TKey>)
- ToDictionary<TKey, TValue>(IEnumerable<(TKey Key, TValue Value)>)
- ToDictionary<TKey, TValue>(IEnumerable<KeyValuePair<TKey, TValue>>)
- ToDictionary<TKey, TValue>(IEnumerable<KeyValuePair<TKey, TValue>>, IEqualityComparer<TKey>)
- ToDictionary<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>)
- ToDictionary<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>, IEqualityComparer<TKey>)
- ToDictionary<TSource, TKey, TElement>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TSource, TElement>)
- ToDictionary<TSource, TKey, TElement>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TSource, TElement>, IEqualityComparer<TKey>)
- ToHashSet<TSource>(IEnumerable<TSource>)
- ToHashSet<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>)
- ToList<TSource>(IEnumerable<TSource>)
- ToLookup<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>)
- ToLookup<TSource, TKey>(IEnumerable<TSource>, Func<TSource, TKey>, IEqualityComparer<TKey>)
- ToLookup<TSource, TKey, TElement>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TSource, TElement>)
- ToLookup<TSource, TKey, TElement>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TSource, TElement>, IEqualityComparer<TKey>)
- TryGetNonEnumeratedCount<TSource>(IEnumerable<TSource>, Int32)
- Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)
- Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)
- UnionBy<TSource, TKey>(IEnumerable<TSource>, IEnumerable<TSource>, Func<TSource, TKey>)
- UnionBy<TSource, TKey>(IEnumerable<TSource>, IEnumerable<TSource>, Func<TSource, TKey>, IEqualityComparer<TKey>)
- Where<TSource>(IEnumerable<TSource>, Func<TSource, Boolean>)
- Where<TSource>(IEnumerable<TSource>, Func<TSource, Int32, Boolean>)
- Zip<TFirst, TSecond>(IEnumerable<TFirst>, IEnumerable<TSecond>)
- Zip<TFirst, TSecond, TThird>(IEnumerable<TFirst>, IEnumerable<TSecond>, IEnumerable<TThird>)
- Zip<TFirst, TSecond, TResult>(IEnumerable<TFirst>, IEnumerable<TSecond>, Func<TFirst, TSecond, TResult>)
net9.0
namespace System.Linq
{
public static class Enumerable
{
public static IEnumerable<KeyValuePair<TKey, int>>! CountBy<TSource, TKey>(this IEnumerable<TSource>! source, Func<TSource, TKey>! keySelector, IEqualityComparer<TKey>? keyComparer = null)
where TKey, notnull;
}
}
| .NET | 9.0 |
|---|---|
Information specific to net9.0 | |
| Assembly | System.Linq , Version=9.0.0.0, PublicKeyToken=b03f5f7f11d50a3a |
| Referencing | The API is automatically referenced. |
| Preview | The API is contained in a preview framework. |
| Platform Restrictions | This API is supported on all platforms. |
- Built-in API
- Package-provided API