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Showing content from https://morelinq.github.io/3.0/ref/api/html/M_MoreLinq_MoreEnumerable_Partition__3_2.htm below:

MoreEnumerablePartitionTKey, TElement, TResult Method (IEnumerableIGroupingTKey, TElement, TKey, TKey, IEqualityComparerTKey, FuncIEnumerableTElement, IEnumerableTElement, IEnumerableIGroupingTKey, TElement, TResult)

MoreEnumerablePartitionTKey, TElement, TResult Method (IEnumerableIGroupingTKey, TElement, TKey, TKey, IEqualityComparerTKey, FuncIEnumerableTElement, IEnumerableTElement, IEnumerableIGroupingTKey, TElement, TResult)

Partitions a grouping and projects a result from elements of groups matching a set of two keys and those groups that do not. An additional parameter specifies how to compare keys for equality.

Namespace:  MoreLinq
Assembly:

MoreLinq (in MoreLinq.dll) Version: 3.0.0

Syntax
public static TResult Partition<TKey, TElement, TResult>(
	this IEnumerable<IGrouping<TKey, TElement>> source,
	TKey key1,
	TKey key2,
	IEqualityComparer<TKey> comparer,
	Func<IEnumerable<TElement>, IEnumerable<TElement>, IEnumerable<IGrouping<TKey, TElement>>, TResult> resultSelector
)
<ExtensionAttribute>
Public Shared Function Partition(Of TKey, TElement, TResult) ( 
	source As IEnumerable(Of IGrouping(Of TKey, TElement)),
	key1 As TKey,
	key2 As TKey,
	comparer As IEqualityComparer(Of TKey),
	resultSelector As Func(Of IEnumerable(Of TElement), IEnumerable(Of TElement), IEnumerable(Of IGrouping(Of TKey, TElement)), TResult)
) As TResult
public:
[ExtensionAttribute]
generic<typename TKey, typename TElement, typename TResult>
static TResult Partition(
	IEnumerable<IGrouping<TKey, TElement>^>^ source, 
	TKey key1, 
	TKey key2, 
	IEqualityComparer<TKey>^ comparer, 
	Func<IEnumerable<TElement>^, IEnumerable<TElement>^, IEnumerable<IGrouping<TKey, TElement>^>^, TResult>^ resultSelector
)
[<ExtensionAttribute>]
static member Partition : 
        source : IEnumerable<IGrouping<'TKey, 'TElement>> * 
        key1 : 'TKey * 
        key2 : 'TKey * 
        comparer : IEqualityComparer<'TKey> * 
        resultSelector : Func<IEnumerable<'TElement>, IEnumerable<'TElement>, IEnumerable<IGrouping<'TKey, 'TElement>>, 'TResult> -> 'TResult 
Parameters
source
Type: System.Collections.GenericIEnumerableIGroupingTKey, TElement
The source sequence.
key1
Type: TKey
The first key to partition on.
key2
Type: TKey
The second key to partition on.
comparer
Type: System.Collections.GenericIEqualityComparerTKey
The comparer for keys.
resultSelector
Type: SystemFuncIEnumerableTElement, IEnumerableTElement, IEnumerableIGroupingTKey, TElement, TResult
Function that projects the result from elements of the group matching key1, elements of the group matching key2 and those groups that do not (in the order in which they appear in source), passed as arguments.
Type Parameters
TKey
Type of keys in source groupings.
TElement
Type of elements in source groupings.
TResult
Type of the result.
Return Value

Type:

TResult

The return value from

resultSelector

.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type

IEnumerableIGroupingTKey

,

TElement

. 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

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