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AsyncEnumerableGroupByTSource, TKey, TElement, TResult Method (IAsyncEnumerableTSource, FuncTSource, TKey, FuncTSource, TElement, FuncTKey, IAsyncEnumerableTElement, TResult, IEqualityComparerTKey)

Namespace: System.Linq
Assembly: System.Interactive.Async (in System.Interactive.Async.dll) Version: 1.2.0.0
Syntax
C#
Copy
public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TElement, TResult>(
	this IAsyncEnumerable<TSource> source,
	Func<TSource, TKey> keySelector,
	Func<TSource, TElement> elementSelector,
	Func<TKey, IAsyncEnumerable<TElement>, TResult> resultSelector,
	IEqualityComparer<TKey> comparer
)

Parameters

source
Type: System.Collections.GenericIAsyncEnumerableTSource
keySelector
Type: SystemFuncTSource, TKey
elementSelector
Type: SystemFuncTSource, TElement
resultSelector
Type: SystemFuncTKey, IAsyncEnumerableTElement, TResult
comparer
Type: System.Collections.GenericIEqualityComparerTKey

Type Parameters

TSource
TKey
TElement
TResult

Return Value

Type: IAsyncEnumerableTResult

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IAsyncEnumerableTSource. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
See Also